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Finding the Fourth Proportional to 640,856.60, 960,132.90 and 307,698.20

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Solution

The fourth proportional to 640,856.60, 960,132.90 and 307,698.20 is: 460,994.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,856.60 : 960,132.90 = 307,698.20 : x
  2. Step 2: Convert to fraction form
    640,856.60/960,132.90 = 307,698.20/x
  3. Step 3: Cross multiply
    640,856.60x = 960,132.90 × 307,698.20
  4. Step 4: Simplify right side
    640,856.60x = 295,431,165,090.78
  5. Step 5: Solve for x
    x = 295,431,165,090.78/640,856.60
  6. Step 6: Final answer
    x = 460,994.18

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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.