Home / 687,235.20-1,029,103.20-655,742.40

Finding the Fourth Proportional to 687,235.20, 1,029,103.20 and 655,742.40

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Solution

The fourth proportional to 687,235.20, 1,029,103.20 and 655,742.40 is: 981,944.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,235.20 : 1,029,103.20 = 655,742.40 : x
  2. Step 2: Convert to fraction form
    687,235.20/1,029,103.20 = 655,742.40/x
  3. Step 3: Cross multiply
    687,235.20x = 1,029,103.20 × 655,742.40
  4. Step 4: Simplify right side
    687,235.20x = 674,826,602,215.68
  5. Step 5: Solve for x
    x = 674,826,602,215.68/687,235.20
  6. Step 6: Final answer
    x = 981,944.18

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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.