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Finding the Fourth Proportional to 686,685.80, 1,029,737.10 and 331,808.60

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Solution

The fourth proportional to 686,685.80, 1,029,737.10 and 331,808.60 is: 497,572.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,685.80 : 1,029,737.10 = 331,808.60 : x
  2. Step 2: Convert to fraction form
    686,685.80/1,029,737.10 = 331,808.60/x
  3. Step 3: Cross multiply
    686,685.80x = 1,029,737.10 × 331,808.60
  4. Step 4: Simplify right side
    686,685.80x = 341,675,625,519.06
  5. Step 5: Solve for x
    x = 341,675,625,519.06/686,685.80
  6. Step 6: Final answer
    x = 497,572.00

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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.