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Finding the Fourth Proportional to 976.62, 1,348.12 and 583.57

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Solution

The fourth proportional to 976.62, 1,348.12 and 583.57 is: 805.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.62 : 1,348.12 = 583.57 : x
  2. Step 2: Convert to fraction form
    976.62/1,348.12 = 583.57/x
  3. Step 3: Cross multiply
    976.62x = 1,348.12 × 583.57
  4. Step 4: Simplify right side
    976.62x = 786,715.65
  5. Step 5: Solve for x
    x = 786,715.65/976.62
  6. Step 6: Final answer
    x = 805.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.