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Finding the Fourth Proportional to 387.18, 532.98 and 352.35

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Solution

The fourth proportional to 387.18, 532.98 and 352.35 is: 485.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.18 : 532.98 = 352.35 : x
  2. Step 2: Convert to fraction form
    387.18/532.98 = 352.35/x
  3. Step 3: Cross multiply
    387.18x = 532.98 × 352.35
  4. Step 4: Simplify right side
    387.18x = 187,795.50
  5. Step 5: Solve for x
    x = 187,795.50/387.18
  6. Step 6: Final answer
    x = 485.03

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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.