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Finding the Fourth Proportional to 520,081.90, 729,689.30 and 520,081.90

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Solution

The fourth proportional to 520,081.90, 729,689.30 and 520,081.90 is: 729,689.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,081.90 : 729,689.30 = 520,081.90 : x
  2. Step 2: Convert to fraction form
    520,081.90/729,689.30 = 520,081.90/x
  3. Step 3: Cross multiply
    520,081.90x = 729,689.30 × 520,081.90
  4. Step 4: Simplify right side
    520,081.90x = 379,498,197,553.67
  5. Step 5: Solve for x
    x = 379,498,197,553.67/520,081.90
  6. Step 6: Final answer
    x = 729,689.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.