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Finding the Fourth Proportional to 42.83, 59.06 and 31.17

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Solution

The fourth proportional to 42.83, 59.06 and 31.17 is: 42.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.83 : 59.06 = 31.17 : x
  2. Step 2: Convert to fraction form
    42.83/59.06 = 31.17/x
  3. Step 3: Cross multiply
    42.83x = 59.06 × 31.17
  4. Step 4: Simplify right side
    42.83x = 1,840.74
  5. Step 5: Solve for x
    x = 1,840.74/42.83
  6. Step 6: Final answer
    x = 42.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.