Home / 659,971.39-988,156.78-499,561.09

Finding the Fourth Proportional to 659,971.39, 988,156.78 and 499,561.09

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Solution

The fourth proportional to 659,971.39, 988,156.78 and 499,561.09 is: 747,978.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,971.39 : 988,156.78 = 499,561.09 : x
  2. Step 2: Convert to fraction form
    659,971.39/988,156.78 = 499,561.09/x
  3. Step 3: Cross multiply
    659,971.39x = 988,156.78 × 499,561.09
  4. Step 4: Simplify right side
    659,971.39x = 493,644,678,107.69
  5. Step 5: Solve for x
    x = 493,644,678,107.69/659,971.39
  6. Step 6: Final answer
    x = 747,978.91

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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.