Home / 918,133.70-1,377,200.55-420,469.70

Finding the Fourth Proportional to 918,133.70, 1,377,200.55 and 420,469.70

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Solution

The fourth proportional to 918,133.70, 1,377,200.55 and 420,469.70 is: 630,704.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,133.70 : 1,377,200.55 = 420,469.70 : x
  2. Step 2: Convert to fraction form
    918,133.70/1,377,200.55 = 420,469.70/x
  3. Step 3: Cross multiply
    918,133.70x = 1,377,200.55 × 420,469.70
  4. Step 4: Simplify right side
    918,133.70x = 579,071,102,098.34
  5. Step 5: Solve for x
    x = 579,071,102,098.34/918,133.70
  6. Step 6: Final answer
    x = 630,704.55

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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.