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Finding the Fourth Proportional to 544.90, 752.21 and 387.67

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Solution

The fourth proportional to 544.90, 752.21 and 387.67 is: 535.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.90 : 752.21 = 387.67 : x
  2. Step 2: Convert to fraction form
    544.90/752.21 = 387.67/x
  3. Step 3: Cross multiply
    544.90x = 752.21 × 387.67
  4. Step 4: Simplify right side
    544.90x = 291,609.25
  5. Step 5: Solve for x
    x = 291,609.25/544.90
  6. Step 6: Final answer
    x = 535.16

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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.