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Finding the Fourth Proportional to 330,616.80, 495,925.20 and 81,298.80

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Solution

The fourth proportional to 330,616.80, 495,925.20 and 81,298.80 is: 121,948.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,616.80 : 495,925.20 = 81,298.80 : x
  2. Step 2: Convert to fraction form
    330,616.80/495,925.20 = 81,298.80/x
  3. Step 3: Cross multiply
    330,616.80x = 495,925.20 × 81,298.80
  4. Step 4: Simplify right side
    330,616.80x = 40,318,123,649.76
  5. Step 5: Solve for x
    x = 40,318,123,649.76/330,616.80
  6. Step 6: Final answer
    x = 121,948.20

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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.