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Finding the Fourth Proportional to 631,181.07, 870,765.63 and 385,980.10

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Solution

The fourth proportional to 631,181.07, 870,765.63 and 385,980.10 is: 532,490.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,181.07 : 870,765.63 = 385,980.10 : x
  2. Step 2: Convert to fraction form
    631,181.07/870,765.63 = 385,980.10/x
  3. Step 3: Cross multiply
    631,181.07x = 870,765.63 × 385,980.10
  4. Step 4: Simplify right side
    631,181.07x = 336,098,204,943.96
  5. Step 5: Solve for x
    x = 336,098,204,943.96/631,181.07
  6. Step 6: Final answer
    x = 532,490.95

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Double scale
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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.