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Finding the Fourth Proportional to 432,815.80, 649,223.70 and 255,407.80

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Solution

The fourth proportional to 432,815.80, 649,223.70 and 255,407.80 is: 383,111.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,815.80 : 649,223.70 = 255,407.80 : x
  2. Step 2: Convert to fraction form
    432,815.80/649,223.70 = 255,407.80/x
  3. Step 3: Cross multiply
    432,815.80x = 649,223.70 × 255,407.80
  4. Step 4: Simplify right side
    432,815.80x = 165,816,796,924.86
  5. Step 5: Solve for x
    x = 165,816,796,924.86/432,815.80
  6. Step 6: Final answer
    x = 383,111.70

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Similar ratio
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1.5x scale

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.