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Finding the Fourth Proportional to 46.47, 64.23 and 42.84

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Solution

The fourth proportional to 46.47, 64.23 and 42.84 is: 59.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.47 : 64.23 = 42.84 : x
  2. Step 2: Convert to fraction form
    46.47/64.23 = 42.84/x
  3. Step 3: Cross multiply
    46.47x = 64.23 × 42.84
  4. Step 4: Simplify right side
    46.47x = 2,751.61
  5. Step 5: Solve for x
    x = 2,751.61/46.47
  6. Step 6: Final answer
    x = 59.21

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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.