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Finding the Fourth Proportional to 693,049.43, 956,411.54 and 387,138.70

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Solution

The fourth proportional to 693,049.43, 956,411.54 and 387,138.70 is: 534,253.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,049.43 : 956,411.54 = 387,138.70 : x
  2. Step 2: Convert to fraction form
    693,049.43/956,411.54 = 387,138.70/x
  3. Step 3: Cross multiply
    693,049.43x = 956,411.54 × 387,138.70
  4. Step 4: Simplify right side
    693,049.43x = 370,263,920,972.19
  5. Step 5: Solve for x
    x = 370,263,920,972.19/693,049.43
  6. Step 6: Final answer
    x = 534,253.27

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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.