Home / 687,214.70-1,029,072.45-655,721.90

Finding the Fourth Proportional to 687,214.70, 1,029,072.45 and 655,721.90

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Solution

The fourth proportional to 687,214.70, 1,029,072.45 and 655,721.90 is: 981,913.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,214.70 : 1,029,072.45 = 655,721.90 : x
  2. Step 2: Convert to fraction form
    687,214.70/1,029,072.45 = 655,721.90/x
  3. Step 3: Cross multiply
    687,214.70x = 1,029,072.45 × 655,721.90
  4. Step 4: Simplify right side
    687,214.70x = 674,785,342,151.66
  5. Step 5: Solve for x
    x = 674,785,342,151.66/687,214.70
  6. Step 6: Final answer
    x = 981,913.43

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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.