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Finding the Fourth Proportional to 490,737.20, 736,105.80 and 372,639.20

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Solution

The fourth proportional to 490,737.20, 736,105.80 and 372,639.20 is: 558,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,737.20 : 736,105.80 = 372,639.20 : x
  2. Step 2: Convert to fraction form
    490,737.20/736,105.80 = 372,639.20/x
  3. Step 3: Cross multiply
    490,737.20x = 736,105.80 × 372,639.20
  4. Step 4: Simplify right side
    490,737.20x = 274,301,876,427.36
  5. Step 5: Solve for x
    x = 274,301,876,427.36/490,737.20
  6. Step 6: Final answer
    x = 558,958.80

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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.