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Finding the Fourth Proportional to 631,129.59, 870,980.04 and 355,534.92

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Solution

The fourth proportional to 631,129.59, 870,980.04 and 355,534.92 is: 490,650.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,129.59 : 870,980.04 = 355,534.92 : x
  2. Step 2: Convert to fraction form
    631,129.59/870,980.04 = 355,534.92/x
  3. Step 3: Cross multiply
    631,129.59x = 870,980.04 × 355,534.92
  4. Step 4: Simplify right side
    631,129.59x = 309,663,818,843.00
  5. Step 5: Solve for x
    x = 309,663,818,843.00/631,129.59
  6. Step 6: Final answer
    x = 490,650.14

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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.