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Finding the Fourth Proportional to 706,737.40, 1,057,431 and 418,703.72

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Solution

The fourth proportional to 706,737.40, 1,057,431 and 418,703.72 is: 626,470.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    706,737.40 : 1,057,431 = 418,703.72 : x
  2. Step 2: Convert to fraction form
    706,737.40/1,057,431 = 418,703.72/x
  3. Step 3: Cross multiply
    706,737.40x = 1,057,431 × 418,703.72
  4. Step 4: Simplify right side
    706,737.40x = 442,750,293,343.32
  5. Step 5: Solve for x
    x = 442,750,293,343.32/706,737.40
  6. Step 6: Final answer
    x = 626,470.73

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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.