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Finding the Fourth Proportional to 331,209.20, 497,143.40 and 153,756.40

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Solution

The fourth proportional to 331,209.20, 497,143.40 and 153,756.40 is: 230,787.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,209.20 : 497,143.40 = 153,756.40 : x
  2. Step 2: Convert to fraction form
    331,209.20/497,143.40 = 153,756.40/x
  3. Step 3: Cross multiply
    331,209.20x = 497,143.40 × 153,756.40
  4. Step 4: Simplify right side
    331,209.20x = 76,438,979,467.76
  5. Step 5: Solve for x
    x = 76,438,979,467.76/331,209.20
  6. Step 6: Final answer
    x = 230,787.61

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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.