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Finding the Fourth Proportional to 625.76, 869.54 and 619.02

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Solution

The fourth proportional to 625.76, 869.54 and 619.02 is: 860.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.76 : 869.54 = 619.02 : x
  2. Step 2: Convert to fraction form
    625.76/869.54 = 619.02/x
  3. Step 3: Cross multiply
    625.76x = 869.54 × 619.02
  4. Step 4: Simplify right side
    625.76x = 538,262.65
  5. Step 5: Solve for x
    x = 538,262.65/625.76
  6. Step 6: Final answer
    x = 860.17

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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.