Home / 645,117.80-966,899.10-329,412.20

Finding the Fourth Proportional to 645,117.80, 966,899.10 and 329,412.20

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Solution

The fourth proportional to 645,117.80, 966,899.10 and 329,412.20 is: 493,721.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,117.80 : 966,899.10 = 329,412.20 : x
  2. Step 2: Convert to fraction form
    645,117.80/966,899.10 = 329,412.20/x
  3. Step 3: Cross multiply
    645,117.80x = 966,899.10 × 329,412.20
  4. Step 4: Simplify right side
    645,117.80x = 318,508,359,709.02
  5. Step 5: Solve for x
    x = 318,508,359,709.02/645,117.80
  6. Step 6: Final answer
    x = 493,721.24

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Double scale
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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.