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Finding the Fourth Proportional to 486,140.80, 729,211.20 and 314,898.70

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Solution

The fourth proportional to 486,140.80, 729,211.20 and 314,898.70 is: 472,348.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,140.80 : 729,211.20 = 314,898.70 : x
  2. Step 2: Convert to fraction form
    486,140.80/729,211.20 = 314,898.70/x
  3. Step 3: Cross multiply
    486,140.80x = 729,211.20 × 314,898.70
  4. Step 4: Simplify right side
    486,140.80x = 229,627,658,905.44
  5. Step 5: Solve for x
    x = 229,627,658,905.44/486,140.80
  6. Step 6: Final answer
    x = 472,348.05

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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.