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Finding the Fourth Proportional to 625, 931.97 and 580.36

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Solution

The fourth proportional to 625, 931.97 and 580.36 is: 865.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    625 : 931.97 = 580.36 : x
  2. Step 2: Convert to fraction form
    625/931.97 = 580.36/x
  3. Step 3: Cross multiply
    625x = 931.97 × 580.36
  4. Step 4: Simplify right side
    625x = 540,878.11
  5. Step 5: Solve for x
    x = 540,878.11/625
  6. Step 6: Final answer
    x = 865.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.