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Finding the Fourth Proportional to 486,354.76, 729,789 and 345,112.72

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Solution

The fourth proportional to 486,354.76, 729,789 and 345,112.72 is: 517,851.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,354.76 : 729,789 = 345,112.72 : x
  2. Step 2: Convert to fraction form
    486,354.76/729,789 = 345,112.72/x
  3. Step 3: Cross multiply
    486,354.76x = 729,789 × 345,112.72
  4. Step 4: Simplify right side
    486,354.76x = 251,859,466,816.08
  5. Step 5: Solve for x
    x = 251,859,466,816.08/486,354.76
  6. Step 6: Final answer
    x = 517,851.35

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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.