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Finding the Fourth Proportional to 64.65, 89.28 and 46.29

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Solution

The fourth proportional to 64.65, 89.28 and 46.29 is: 63.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.65 : 89.28 = 46.29 : x
  2. Step 2: Convert to fraction form
    64.65/89.28 = 46.29/x
  3. Step 3: Cross multiply
    64.65x = 89.28 × 46.29
  4. Step 4: Simplify right side
    64.65x = 4,132.77
  5. Step 5: Solve for x
    x = 4,132.77/64.65
  6. Step 6: Final answer
    x = 63.93

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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.