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Finding the Fourth Proportional to 631,179.57, 870,763.56 and 385,978.60

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Solution

The fourth proportional to 631,179.57, 870,763.56 and 385,978.60 is: 532,488.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,179.57 : 870,763.56 = 385,978.60 : x
  2. Step 2: Convert to fraction form
    631,179.57/870,763.56 = 385,978.60/x
  3. Step 3: Cross multiply
    631,179.57x = 870,763.56 × 385,978.60
  4. Step 4: Simplify right side
    631,179.57x = 336,096,099,819.82
  5. Step 5: Solve for x
    x = 336,096,099,819.82/631,179.57
  6. Step 6: Final answer
    x = 532,488.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.