Home / 816,640.11-1,225,123.68-457,321.95

Finding the Fourth Proportional to 816,640.11, 1,225,123.68 and 457,321.95

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Solution

The fourth proportional to 816,640.11, 1,225,123.68 and 457,321.95 is: 686,074.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,640.11 : 1,225,123.68 = 457,321.95 : x
  2. Step 2: Convert to fraction form
    816,640.11/1,225,123.68 = 457,321.95/x
  3. Step 3: Cross multiply
    816,640.11x = 1,225,123.68 × 457,321.95
  4. Step 4: Simplify right side
    816,640.11x = 560,275,941,916.55
  5. Step 5: Solve for x
    x = 560,275,941,916.55/816,640.11
  6. Step 6: Final answer
    x = 686,074.48

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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.