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Finding the Fourth Proportional to 386.08, 532.88 and 247.84

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Solution

The fourth proportional to 386.08, 532.88 and 247.84 is: 342.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.08 : 532.88 = 247.84 : x
  2. Step 2: Convert to fraction form
    386.08/532.88 = 247.84/x
  3. Step 3: Cross multiply
    386.08x = 532.88 × 247.84
  4. Step 4: Simplify right side
    386.08x = 132,068.98
  5. Step 5: Solve for x
    x = 132,068.98/386.08
  6. Step 6: Final answer
    x = 342.08

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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.