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Finding the Fourth Proportional to 652.39, 979.22 and 612.77

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Solution

The fourth proportional to 652.39, 979.22 and 612.77 is: 919.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.39 : 979.22 = 612.77 : x
  2. Step 2: Convert to fraction form
    652.39/979.22 = 612.77/x
  3. Step 3: Cross multiply
    652.39x = 979.22 × 612.77
  4. Step 4: Simplify right side
    652.39x = 600,033.28
  5. Step 5: Solve for x
    x = 600,033.28/652.39
  6. Step 6: Final answer
    x = 919.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.