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Finding the Fourth Proportional to 47.29, 65.19 and 40.00

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Solution

The fourth proportional to 47.29, 65.19 and 40.00 is: 55.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.29 : 65.19 = 40.00 : x
  2. Step 2: Convert to fraction form
    47.29/65.19 = 40.00/x
  3. Step 3: Cross multiply
    47.29x = 65.19 × 40.00
  4. Step 4: Simplify right side
    47.29x = 2,607.44
  5. Step 5: Solve for x
    x = 2,607.44/47.29
  6. Step 6: Final answer
    x = 55.14

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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.