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Finding the Fourth Proportional to 544.63, 751.65 and 311.75

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Solution

The fourth proportional to 544.63, 751.65 and 311.75 is: 430.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.63 : 751.65 = 311.75 : x
  2. Step 2: Convert to fraction form
    544.63/751.65 = 311.75/x
  3. Step 3: Cross multiply
    544.63x = 751.65 × 311.75
  4. Step 4: Simplify right side
    544.63x = 234,326.89
  5. Step 5: Solve for x
    x = 234,326.89/544.63
  6. Step 6: Final answer
    x = 430.25

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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.