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Finding the Fourth Proportional to 387.43, 581.84 and 356.52

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Solution

The fourth proportional to 387.43, 581.84 and 356.52 is: 535.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.43 : 581.84 = 356.52 : x
  2. Step 2: Convert to fraction form
    387.43/581.84 = 356.52/x
  3. Step 3: Cross multiply
    387.43x = 581.84 × 356.52
  4. Step 4: Simplify right side
    387.43x = 207,437.60
  5. Step 5: Solve for x
    x = 207,437.60/387.43
  6. Step 6: Final answer
    x = 535.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.