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Finding the Fourth Proportional to 659,790.80, 989,686.20 and 502,326.80

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Solution

The fourth proportional to 659,790.80, 989,686.20 and 502,326.80 is: 753,490.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,790.80 : 989,686.20 = 502,326.80 : x
  2. Step 2: Convert to fraction form
    659,790.80/989,686.20 = 502,326.80/x
  3. Step 3: Cross multiply
    659,790.80x = 989,686.20 × 502,326.80
  4. Step 4: Simplify right side
    659,790.80x = 497,145,901,850.16
  5. Step 5: Solve for x
    x = 497,145,901,850.16/659,790.80
  6. Step 6: Final answer
    x = 753,490.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.