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Finding the Fourth Proportional to 438,352.80, 658,220.40 and 251,728.80

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Solution

The fourth proportional to 438,352.80, 658,220.40 and 251,728.80 is: 377,990.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,352.80 : 658,220.40 = 251,728.80 : x
  2. Step 2: Convert to fraction form
    438,352.80/658,220.40 = 251,728.80/x
  3. Step 3: Cross multiply
    438,352.80x = 658,220.40 × 251,728.80
  4. Step 4: Simplify right side
    438,352.80x = 165,693,031,427.52
  5. Step 5: Solve for x
    x = 165,693,031,427.52/438,352.80
  6. Step 6: Final answer
    x = 377,990.13

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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.