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Finding the Fourth Proportional to 432,876.80, 649,315.20 and 255,468.80

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Solution

The fourth proportional to 432,876.80, 649,315.20 and 255,468.80 is: 383,203.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,876.80 : 649,315.20 = 255,468.80 : x
  2. Step 2: Convert to fraction form
    432,876.80/649,315.20 = 255,468.80/x
  3. Step 3: Cross multiply
    432,876.80x = 649,315.20 × 255,468.80
  4. Step 4: Simplify right side
    432,876.80x = 165,879,774,965.76
  5. Step 5: Solve for x
    x = 165,879,774,965.76/432,876.80
  6. Step 6: Final answer
    x = 383,203.20

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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.