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Finding the Fourth Proportional to 438,326.20, 657,489.30 and 363,530.80

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Solution

The fourth proportional to 438,326.20, 657,489.30 and 363,530.80 is: 545,296.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,326.20 : 657,489.30 = 363,530.80 : x
  2. Step 2: Convert to fraction form
    438,326.20/657,489.30 = 363,530.80/x
  3. Step 3: Cross multiply
    438,326.20x = 657,489.30 × 363,530.80
  4. Step 4: Simplify right side
    438,326.20x = 239,017,611,220.44
  5. Step 5: Solve for x
    x = 239,017,611,220.44/438,326.20
  6. Step 6: Final answer
    x = 545,296.20

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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.