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Finding the Fourth Proportional to 1,910.31, 2,865.41 and 542.31

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Solution

The fourth proportional to 1,910.31, 2,865.41 and 542.31 is: 813.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,910.31 : 2,865.41 = 542.31 : x
  2. Step 2: Convert to fraction form
    1,910.31/2,865.41 = 542.31/x
  3. Step 3: Cross multiply
    1,910.31x = 2,865.41 × 542.31
  4. Step 4: Simplify right side
    1,910.31x = 1,553,937.79
  5. Step 5: Solve for x
    x = 1,553,937.79/1,910.31
  6. Step 6: Final answer
    x = 813.45

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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.