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Finding the Fourth Proportional to 547.12, 755.40 and 392.32

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Solution

The fourth proportional to 547.12, 755.40 and 392.32 is: 541.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.12 : 755.40 = 392.32 : x
  2. Step 2: Convert to fraction form
    547.12/755.40 = 392.32/x
  3. Step 3: Cross multiply
    547.12x = 755.40 × 392.32
  4. Step 4: Simplify right side
    547.12x = 296,358.53
  5. Step 5: Solve for x
    x = 296,358.53/547.12
  6. Step 6: Final answer
    x = 541.67

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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.