Home / 351,931.40-527,897.10-85,689.80

Finding the Fourth Proportional to 351,931.40, 527,897.10 and 85,689.80

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Solution

The fourth proportional to 351,931.40, 527,897.10 and 85,689.80 is: 128,534.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,931.40 : 527,897.10 = 85,689.80 : x
  2. Step 2: Convert to fraction form
    351,931.40/527,897.10 = 85,689.80/x
  3. Step 3: Cross multiply
    351,931.40x = 527,897.10 × 85,689.80
  4. Step 4: Simplify right side
    351,931.40x = 45,235,396,919.58
  5. Step 5: Solve for x
    x = 45,235,396,919.58/351,931.40
  6. Step 6: Final answer
    x = 128,534.70

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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.