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Finding the Fourth Proportional to 720,557.56, 994,373.34 and 393,871.02

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Solution

The fourth proportional to 720,557.56, 994,373.34 and 393,871.02 is: 543,544.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,557.56 : 994,373.34 = 393,871.02 : x
  2. Step 2: Convert to fraction form
    720,557.56/994,373.34 = 393,871.02/x
  3. Step 3: Cross multiply
    720,557.56x = 994,373.34 × 393,871.02
  4. Step 4: Simplify right side
    720,557.56x = 391,654,841,686.61
  5. Step 5: Solve for x
    x = 391,654,841,686.61/720,557.56
  6. Step 6: Final answer
    x = 543,544.14

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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.