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Finding the Fourth Proportional to 625.51, 869.17 and 618.76

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Solution

The fourth proportional to 625.51, 869.17 and 618.76 is: 859.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.51 : 869.17 = 618.76 : x
  2. Step 2: Convert to fraction form
    625.51/869.17 = 618.76/x
  3. Step 3: Cross multiply
    625.51x = 869.17 × 618.76
  4. Step 4: Simplify right side
    625.51x = 537,807.63
  5. Step 5: Solve for x
    x = 537,807.63/625.51
  6. Step 6: Final answer
    x = 859.79

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.