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Finding the Fourth Proportional to 287,585.20, 431,377.80 and 110,000.80

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Solution

The fourth proportional to 287,585.20, 431,377.80 and 110,000.80 is: 165,001.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,585.20 : 431,377.80 = 110,000.80 : x
  2. Step 2: Convert to fraction form
    287,585.20/431,377.80 = 110,000.80/x
  3. Step 3: Cross multiply
    287,585.20x = 431,377.80 × 110,000.80
  4. Step 4: Simplify right side
    287,585.20x = 47,451,903,102.24
  5. Step 5: Solve for x
    x = 47,451,903,102.24/287,585.20
  6. Step 6: Final answer
    x = 165,001.20

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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.