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Finding the Fourth Proportional to 659,136.20, 988,646.70 and 215,904.20

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Solution

The fourth proportional to 659,136.20, 988,646.70 and 215,904.20 is: 323,837.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,136.20 : 988,646.70 = 215,904.20 : x
  2. Step 2: Convert to fraction form
    659,136.20/988,646.70 = 215,904.20/x
  3. Step 3: Cross multiply
    659,136.20x = 988,646.70 × 215,904.20
  4. Step 4: Simplify right side
    659,136.20x = 213,452,974,846.14
  5. Step 5: Solve for x
    x = 213,452,974,846.14/659,136.20
  6. Step 6: Final answer
    x = 323,837.43

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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.