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Finding the Fourth Proportional to 489,352.80, 734,029.20 and 438,031.20

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Solution

The fourth proportional to 489,352.80, 734,029.20 and 438,031.20 is: 657,046.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,352.80 : 734,029.20 = 438,031.20 : x
  2. Step 2: Convert to fraction form
    489,352.80/734,029.20 = 438,031.20/x
  3. Step 3: Cross multiply
    489,352.80x = 734,029.20 × 438,031.20
  4. Step 4: Simplify right side
    489,352.80x = 321,527,691,311.04
  5. Step 5: Solve for x
    x = 321,527,691,311.04/489,352.80
  6. Step 6: Final answer
    x = 657,046.80

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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.