Home / 687,446.53-948,790.23-400,966.61

Finding the Fourth Proportional to 687,446.53, 948,790.23 and 400,966.61

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Solution

The fourth proportional to 687,446.53, 948,790.23 and 400,966.61 is: 553,400.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,446.53 : 948,790.23 = 400,966.61 : x
  2. Step 2: Convert to fraction form
    687,446.53/948,790.23 = 400,966.61/x
  3. Step 3: Cross multiply
    687,446.53x = 948,790.23 × 400,966.61
  4. Step 4: Simplify right side
    687,446.53x = 380,433,197,380.27
  5. Step 5: Solve for x
    x = 380,433,197,380.27/687,446.53
  6. Step 6: Final answer
    x = 553,400.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.