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Finding the Fourth Proportional to 387.98, 535.52 and 240.53

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Solution

The fourth proportional to 387.98, 535.52 and 240.53 is: 332.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.98 : 535.52 = 240.53 : x
  2. Step 2: Convert to fraction form
    387.98/535.52 = 240.53/x
  3. Step 3: Cross multiply
    387.98x = 535.52 × 240.53
  4. Step 4: Simplify right side
    387.98x = 128,808.63
  5. Step 5: Solve for x
    x = 128,808.63/387.98
  6. Step 6: Final answer
    x = 332.00

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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.