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Finding the Fourth Proportional to 660.77, 916.03 and 625.65

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Solution

The fourth proportional to 660.77, 916.03 and 625.65 is: 867.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.77 : 916.03 = 625.65 : x
  2. Step 2: Convert to fraction form
    660.77/916.03 = 625.65/x
  3. Step 3: Cross multiply
    660.77x = 916.03 × 625.65
  4. Step 4: Simplify right side
    660.77x = 573,110.57
  5. Step 5: Solve for x
    x = 573,110.57/660.77
  6. Step 6: Final answer
    x = 867.34

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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.