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Finding the Fourth Proportional to 490,838.40, 736,257.60 and 487,339.20

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Solution

The fourth proportional to 490,838.40, 736,257.60 and 487,339.20 is: 731,008.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,838.40 : 736,257.60 = 487,339.20 : x
  2. Step 2: Convert to fraction form
    490,838.40/736,257.60 = 487,339.20/x
  3. Step 3: Cross multiply
    490,838.40x = 736,257.60 × 487,339.20
  4. Step 4: Simplify right side
    490,838.40x = 358,807,189,777.92
  5. Step 5: Solve for x
    x = 358,807,189,777.92/490,838.40
  6. Step 6: Final answer
    x = 731,008.80

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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.