Home / 918,200.70-1,377,301.05-287,307.90

Finding the Fourth Proportional to 918,200.70, 1,377,301.05 and 287,307.90

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Solution

The fourth proportional to 918,200.70, 1,377,301.05 and 287,307.90 is: 430,961.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,200.70 : 1,377,301.05 = 287,307.90 : x
  2. Step 2: Convert to fraction form
    918,200.70/1,377,301.05 = 287,307.90/x
  3. Step 3: Cross multiply
    918,200.70x = 1,377,301.05 × 287,307.90
  4. Step 4: Simplify right side
    918,200.70x = 395,709,472,343.30
  5. Step 5: Solve for x
    x = 395,709,472,343.30/918,200.70
  6. Step 6: Final answer
    x = 430,961.85

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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.