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Finding the Fourth Proportional to 55.40, 76.30 and 46.18

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Solution

The fourth proportional to 55.40, 76.30 and 46.18 is: 63.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.40 : 76.30 = 46.18 : x
  2. Step 2: Convert to fraction form
    55.40/76.30 = 46.18/x
  3. Step 3: Cross multiply
    55.40x = 76.30 × 46.18
  4. Step 4: Simplify right side
    55.40x = 3,523.23
  5. Step 5: Solve for x
    x = 3,523.23/55.40
  6. Step 6: Final answer
    x = 63.60

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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.