Home / 686,100.30-1,029,150.45-312,123.30

Finding the Fourth Proportional to 686,100.30, 1,029,150.45 and 312,123.30

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Solution

The fourth proportional to 686,100.30, 1,029,150.45 and 312,123.30 is: 468,184.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,100.30 : 1,029,150.45 = 312,123.30 : x
  2. Step 2: Convert to fraction form
    686,100.30/1,029,150.45 = 312,123.30/x
  3. Step 3: Cross multiply
    686,100.30x = 1,029,150.45 × 312,123.30
  4. Step 4: Simplify right side
    686,100.30x = 321,221,834,650.49
  5. Step 5: Solve for x
    x = 321,221,834,650.49/686,100.30
  6. Step 6: Final answer
    x = 468,184.95

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Double scale
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Similar ratio
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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.