Home / 638,831,312.20-958,246,968.30-409,248,800.20

Finding the Fourth Proportional to 638,831,312.20, 958,246,968.30 and 409,248,800.20

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Solution

The fourth proportional to 638,831,312.20, 958,246,968.30 and 409,248,800.20 is: 613,873,200.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,831,312.20 : 958,246,968.30 = 409,248,800.20 : x
  2. Step 2: Convert to fraction form
    638,831,312.20/958,246,968.30 = 409,248,800.20/x
  3. Step 3: Cross multiply
    638,831,312.20x = 958,246,968.30 × 409,248,800.20
  4. Step 4: Simplify right side
    638,831,312.20x = 392,161,422,072,062,400
  5. Step 5: Solve for x
    x = 392,161,422,072,062,400/638,831,312.20
  6. Step 6: Final answer
    x = 613,873,200.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.