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Finding the Fourth Proportional to 638,971,972.80, 958,457,959.20 and 570,097,219.20

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Solution

The fourth proportional to 638,971,972.80, 958,457,959.20 and 570,097,219.20 is: 855,145,828.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,971,972.80 : 958,457,959.20 = 570,097,219.20 : x
  2. Step 2: Convert to fraction form
    638,971,972.80/958,457,959.20 = 570,097,219.20/x
  3. Step 3: Cross multiply
    638,971,972.80x = 958,457,959.20 × 570,097,219.20
  4. Step 4: Simplify right side
    638,971,972.80x = 546,414,217,260,027,136
  5. Step 5: Solve for x
    x = 546,414,217,260,027,136/638,971,972.80
  6. Step 6: Final answer
    x = 855,145,828.80

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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.