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Finding the Fourth Proportional to 386.47, 532.71 and 303.45

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Solution

The fourth proportional to 386.47, 532.71 and 303.45 is: 418.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.47 : 532.71 = 303.45 : x
  2. Step 2: Convert to fraction form
    386.47/532.71 = 303.45/x
  3. Step 3: Cross multiply
    386.47x = 532.71 × 303.45
  4. Step 4: Simplify right side
    386.47x = 161,648.85
  5. Step 5: Solve for x
    x = 161,648.85/386.47
  6. Step 6: Final answer
    x = 418.27

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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.