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Finding the Fourth Proportional to 625.64, 855.72 and 615.56

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Solution

The fourth proportional to 625.64, 855.72 and 615.56 is: 841.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.64 : 855.72 = 615.56 : x
  2. Step 2: Convert to fraction form
    625.64/855.72 = 615.56/x
  3. Step 3: Cross multiply
    625.64x = 855.72 × 615.56
  4. Step 4: Simplify right side
    625.64x = 526,747.00
  5. Step 5: Solve for x
    x = 526,747.00/625.64
  6. Step 6: Final answer
    x = 841.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.