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Finding the Fourth Proportional to 555,005.70, 832,508.55 and 520,013.70

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Solution

The fourth proportional to 555,005.70, 832,508.55 and 520,013.70 is: 780,020.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,005.70 : 832,508.55 = 520,013.70 : x
  2. Step 2: Convert to fraction form
    555,005.70/832,508.55 = 520,013.70/x
  3. Step 3: Cross multiply
    555,005.70x = 832,508.55 × 520,013.70
  4. Step 4: Simplify right side
    555,005.70x = 432,915,851,367.14
  5. Step 5: Solve for x
    x = 432,915,851,367.14/555,005.70
  6. Step 6: Final answer
    x = 780,020.55

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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.