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Finding the Fourth Proportional to 693,490.72, 957,003.60 and 387,569.92

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Solution

The fourth proportional to 693,490.72, 957,003.60 and 387,569.92 is: 534,838.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,490.72 : 957,003.60 = 387,569.92 : x
  2. Step 2: Convert to fraction form
    693,490.72/957,003.60 = 387,569.92/x
  3. Step 3: Cross multiply
    693,490.72x = 957,003.60 × 387,569.92
  4. Step 4: Simplify right side
    693,490.72x = 370,905,808,691.71
  5. Step 5: Solve for x
    x = 370,905,808,691.71/693,490.72
  6. Step 6: Final answer
    x = 534,838.89

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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.