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Finding the Fourth Proportional to 1,531.95, 2,298 and 436.23

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Solution

The fourth proportional to 1,531.95, 2,298 and 436.23 is: 654.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.95 : 2,298 = 436.23 : x
  2. Step 2: Convert to fraction form
    1,531.95/2,298 = 436.23/x
  3. Step 3: Cross multiply
    1,531.95x = 2,298 × 436.23
  4. Step 4: Simplify right side
    1,531.95x = 1,002,456.54
  5. Step 5: Solve for x
    x = 1,002,456.54/1,531.95
  6. Step 6: Final answer
    x = 654.37

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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.