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Finding the Fourth Proportional to 814,243.60, 1,221,480.60 and 315,658

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Solution

The fourth proportional to 814,243.60, 1,221,480.60 and 315,658 is: 473,531.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,243.60 : 1,221,480.60 = 315,658 : x
  2. Step 2: Convert to fraction form
    814,243.60/1,221,480.60 = 315,658/x
  3. Step 3: Cross multiply
    814,243.60x = 1,221,480.60 × 315,658
  4. Step 4: Simplify right side
    814,243.60x = 385,570,123,234.80
  5. Step 5: Solve for x
    x = 385,570,123,234.80/814,243.60
  6. Step 6: Final answer
    x = 473,531.66

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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.