Home / 687,212.20-1,029,068.70-655,719.40

Finding the Fourth Proportional to 687,212.20, 1,029,068.70 and 655,719.40

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Solution

The fourth proportional to 687,212.20, 1,029,068.70 and 655,719.40 is: 981,909.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,212.20 : 1,029,068.70 = 655,719.40 : x
  2. Step 2: Convert to fraction form
    687,212.20/1,029,068.70 = 655,719.40/x
  3. Step 3: Cross multiply
    687,212.20x = 1,029,068.70 × 655,719.40
  4. Step 4: Simplify right side
    687,212.20x = 674,780,310,522.78
  5. Step 5: Solve for x
    x = 674,780,310,522.78/687,212.20
  6. Step 6: Final answer
    x = 981,909.68

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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.