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Finding the Fourth Proportional to 363,987.60, 545,981.40 and 331,328.40

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Solution

The fourth proportional to 363,987.60, 545,981.40 and 331,328.40 is: 496,992.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,987.60 : 545,981.40 = 331,328.40 : x
  2. Step 2: Convert to fraction form
    363,987.60/545,981.40 = 331,328.40/x
  3. Step 3: Cross multiply
    363,987.60x = 545,981.40 × 331,328.40
  4. Step 4: Simplify right side
    363,987.60x = 180,899,143,691.76
  5. Step 5: Solve for x
    x = 180,899,143,691.76/363,987.60
  6. Step 6: Final answer
    x = 496,992.60

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Double scale
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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.