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Finding the Fourth Proportional to 625.08, 857.68 and 619.28

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Solution

The fourth proportional to 625.08, 857.68 and 619.28 is: 849.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.08 : 857.68 = 619.28 : x
  2. Step 2: Convert to fraction form
    625.08/857.68 = 619.28/x
  3. Step 3: Cross multiply
    625.08x = 857.68 × 619.28
  4. Step 4: Simplify right side
    625.08x = 531,144.07
  5. Step 5: Solve for x
    x = 531,144.07/625.08
  6. Step 6: Final answer
    x = 849.72

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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.