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Finding the Fourth Proportional to 485,603.76, 727,957 and 307,572.40

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Solution

The fourth proportional to 485,603.76, 727,957 and 307,572.40 is: 461,074.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,603.76 : 727,957 = 307,572.40 : x
  2. Step 2: Convert to fraction form
    485,603.76/727,957 = 307,572.40/x
  3. Step 3: Cross multiply
    485,603.76x = 727,957 × 307,572.40
  4. Step 4: Simplify right side
    485,603.76x = 223,899,481,586.80
  5. Step 5: Solve for x
    x = 223,899,481,586.80/485,603.76
  6. Step 6: Final answer
    x = 461,074.44

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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.