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Finding the Fourth Proportional to 917,105.80, 1,375,658.70 and 252,257.80

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Solution

The fourth proportional to 917,105.80, 1,375,658.70 and 252,257.80 is: 378,386.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,105.80 : 1,375,658.70 = 252,257.80 : x
  2. Step 2: Convert to fraction form
    917,105.80/1,375,658.70 = 252,257.80/x
  3. Step 3: Cross multiply
    917,105.80x = 1,375,658.70 × 252,257.80
  4. Step 4: Simplify right side
    917,105.80x = 347,020,637,212.86
  5. Step 5: Solve for x
    x = 347,020,637,212.86/917,105.80
  6. Step 6: Final answer
    x = 378,386.70

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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.