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Finding the Fourth Proportional to 438,803.60, 658,205.40 and 251,661.20

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Solution

The fourth proportional to 438,803.60, 658,205.40 and 251,661.20 is: 377,491.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,803.60 : 658,205.40 = 251,661.20 : x
  2. Step 2: Convert to fraction form
    438,803.60/658,205.40 = 251,661.20/x
  3. Step 3: Cross multiply
    438,803.60x = 658,205.40 × 251,661.20
  4. Step 4: Simplify right side
    438,803.60x = 165,644,760,810.48
  5. Step 5: Solve for x
    x = 165,644,760,810.48/438,803.60
  6. Step 6: Final answer
    x = 377,491.80

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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.