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Finding the Fourth Proportional to 363,979.60, 545,969.40 and 331,320.40

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Solution

The fourth proportional to 363,979.60, 545,969.40 and 331,320.40 is: 496,980.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,979.60 : 545,969.40 = 331,320.40 : x
  2. Step 2: Convert to fraction form
    363,979.60/545,969.40 = 331,320.40/x
  3. Step 3: Cross multiply
    363,979.60x = 545,969.40 × 331,320.40
  4. Step 4: Simplify right side
    363,979.60x = 180,890,799,995.76
  5. Step 5: Solve for x
    x = 180,890,799,995.76/363,979.60
  6. Step 6: Final answer
    x = 496,980.60

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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.