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Finding the Fourth Proportional to 490,334.40, 736,279.20 and 372,139.20

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Solution

The fourth proportional to 490,334.40, 736,279.20 and 372,139.20 is: 558,798.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,334.40 : 736,279.20 = 372,139.20 : x
  2. Step 2: Convert to fraction form
    490,334.40/736,279.20 = 372,139.20/x
  3. Step 3: Cross multiply
    490,334.40x = 736,279.20 × 372,139.20
  4. Step 4: Simplify right side
    490,334.40x = 273,998,352,464.64
  5. Step 5: Solve for x
    x = 273,998,352,464.64/490,334.40
  6. Step 6: Final answer
    x = 558,798.96

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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.