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Finding the Fourth Proportional to 641,715.40, 962,573.10 and 442,649.80

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Solution

The fourth proportional to 641,715.40, 962,573.10 and 442,649.80 is: 663,974.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,715.40 : 962,573.10 = 442,649.80 : x
  2. Step 2: Convert to fraction form
    641,715.40/962,573.10 = 442,649.80/x
  3. Step 3: Cross multiply
    641,715.40x = 962,573.10 × 442,649.80
  4. Step 4: Simplify right side
    641,715.40x = 426,082,790,200.38
  5. Step 5: Solve for x
    x = 426,082,790,200.38/641,715.40
  6. Step 6: Final answer
    x = 663,974.70

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Double scale
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Similar ratio
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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.