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Finding the Fourth Proportional to 64.91, 97.37 and 61.00

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Solution

The fourth proportional to 64.91, 97.37 and 61.00 is: 91.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.91 : 97.37 = 61.00 : x
  2. Step 2: Convert to fraction form
    64.91/97.37 = 61.00/x
  3. Step 3: Cross multiply
    64.91x = 97.37 × 61.00
  4. Step 4: Simplify right side
    64.91x = 5,939.31
  5. Step 5: Solve for x
    x = 5,939.31/64.91
  6. Step 6: Final answer
    x = 91.50

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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.