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Finding the Fourth Proportional to 976.67, 1,347.76 and 583.91

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Solution

The fourth proportional to 976.67, 1,347.76 and 583.91 is: 805.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.67 : 1,347.76 = 583.91 : x
  2. Step 2: Convert to fraction form
    976.67/1,347.76 = 583.91/x
  3. Step 3: Cross multiply
    976.67x = 1,347.76 × 583.91
  4. Step 4: Simplify right side
    976.67x = 786,970.54
  5. Step 5: Solve for x
    x = 786,970.54/976.67
  6. Step 6: Final answer
    x = 805.77

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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.