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Finding the Fourth Proportional to 544.45, 751.32 and 311.57

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Solution

The fourth proportional to 544.45, 751.32 and 311.57 is: 429.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.45 : 751.32 = 311.57 : x
  2. Step 2: Convert to fraction form
    544.45/751.32 = 311.57/x
  3. Step 3: Cross multiply
    544.45x = 751.32 × 311.57
  4. Step 4: Simplify right side
    544.45x = 234,088.77
  5. Step 5: Solve for x
    x = 234,088.77/544.45
  6. Step 6: Final answer
    x = 429.95

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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.