Home / 645,123.80-966,908.10-329,418.20

Finding the Fourth Proportional to 645,123.80, 966,908.10 and 329,418.20

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Solution

The fourth proportional to 645,123.80, 966,908.10 and 329,418.20 is: 493,730.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,123.80 : 966,908.10 = 329,418.20 : x
  2. Step 2: Convert to fraction form
    645,123.80/966,908.10 = 329,418.20/x
  3. Step 3: Cross multiply
    645,123.80x = 966,908.10 × 329,418.20
  4. Step 4: Simplify right side
    645,123.80x = 318,517,125,867.42
  5. Step 5: Solve for x
    x = 318,517,125,867.42/645,123.80
  6. Step 6: Final answer
    x = 493,730.24

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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.