Home / 686,082.10-1,029,123.15-212,815.30

Finding the Fourth Proportional to 686,082.10, 1,029,123.15 and 212,815.30

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Solution

The fourth proportional to 686,082.10, 1,029,123.15 and 212,815.30 is: 319,222.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,082.10 : 1,029,123.15 = 212,815.30 : x
  2. Step 2: Convert to fraction form
    686,082.10/1,029,123.15 = 212,815.30/x
  3. Step 3: Cross multiply
    686,082.10x = 1,029,123.15 × 212,815.30
  4. Step 4: Simplify right side
    686,082.10x = 219,013,151,904.20
  5. Step 5: Solve for x
    x = 219,013,151,904.20/686,082.10
  6. Step 6: Final answer
    x = 319,222.95

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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.