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Finding the Fourth Proportional to 653,651.28, 902,136.96 and 399,149.28

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Solution

The fourth proportional to 653,651.28, 902,136.96 and 399,149.28 is: 550,885.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,651.28 : 902,136.96 = 399,149.28 : x
  2. Step 2: Convert to fraction form
    653,651.28/902,136.96 = 399,149.28/x
  3. Step 3: Cross multiply
    653,651.28x = 902,136.96 × 399,149.28
  4. Step 4: Simplify right side
    653,651.28x = 360,087,318,045.39
  5. Step 5: Solve for x
    x = 360,087,318,045.39/653,651.28
  6. Step 6: Final answer
    x = 550,885.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.