Home / 688,305,815.81-1,031,723,545.17-392,564,213.72

Finding the Fourth Proportional to 688,305,815.81, 1,031,723,545.17 and 392,564,213.72

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Solution

The fourth proportional to 688,305,815.81, 1,031,723,545.17 and 392,564,213.72 is: 588,427,023.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,305,815.81 : 1,031,723,545.17 = 392,564,213.72 : x
  2. Step 2: Convert to fraction form
    688,305,815.81/1,031,723,545.17 = 392,564,213.72/x
  3. Step 3: Cross multiply
    688,305,815.81x = 1,031,723,545.17 × 392,564,213.72
  4. Step 4: Simplify right side
    688,305,815.81x = 405,017,742,286,274,048
  5. Step 5: Solve for x
    x = 405,017,742,286,274,048/688,305,815.81
  6. Step 6: Final answer
    x = 588,427,023.26

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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.