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Finding the Fourth Proportional to 438,658.80, 657,113.40 and 251,451.60

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Solution

The fourth proportional to 438,658.80, 657,113.40 and 251,451.60 is: 376,675.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,658.80 : 657,113.40 = 251,451.60 : x
  2. Step 2: Convert to fraction form
    438,658.80/657,113.40 = 251,451.60/x
  3. Step 3: Cross multiply
    438,658.80x = 657,113.40 × 251,451.60
  4. Step 4: Simplify right side
    438,658.80x = 165,232,215,811.44
  5. Step 5: Solve for x
    x = 165,232,215,811.44/438,658.80
  6. Step 6: Final answer
    x = 376,675.94

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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.