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Finding the Fourth Proportional to 288,326.49, 432,568.64 and 138,691.95

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Solution

The fourth proportional to 288,326.49, 432,568.64 and 138,691.95 is: 208,075.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,326.49 : 432,568.64 = 138,691.95 : x
  2. Step 2: Convert to fraction form
    288,326.49/432,568.64 = 138,691.95/x
  3. Step 3: Cross multiply
    288,326.49x = 432,568.64 × 138,691.95
  4. Step 4: Simplify right side
    288,326.49x = 59,993,788,190.45
  5. Step 5: Solve for x
    x = 59,993,788,190.45/288,326.49
  6. Step 6: Final answer
    x = 208,075.88

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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.