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Finding the Fourth Proportional to 631,062.64, 870,372.84 and 404,729.20

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Solution

The fourth proportional to 631,062.64, 870,372.84 and 404,729.20 is: 558,209.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,062.64 : 870,372.84 = 404,729.20 : x
  2. Step 2: Convert to fraction form
    631,062.64/870,372.84 = 404,729.20/x
  3. Step 3: Cross multiply
    631,062.64x = 870,372.84 × 404,729.20
  4. Step 4: Simplify right side
    631,062.64x = 352,265,303,234.93
  5. Step 5: Solve for x
    x = 352,265,303,234.93/631,062.64
  6. Step 6: Final answer
    x = 558,209.73

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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.