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Finding the Fourth Proportional to 1,712.61, 2,567.95 and 542.39

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Solution

The fourth proportional to 1,712.61, 2,567.95 and 542.39 is: 813.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,712.61 : 2,567.95 = 542.39 : x
  2. Step 2: Convert to fraction form
    1,712.61/2,567.95 = 542.39/x
  3. Step 3: Cross multiply
    1,712.61x = 2,567.95 × 542.39
  4. Step 4: Simplify right side
    1,712.61x = 1,392,827.69
  5. Step 5: Solve for x
    x = 1,392,827.69/1,712.61
  6. Step 6: Final answer
    x = 813.28

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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.