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Finding the Fourth Proportional to 976.12, 1,346.76 and 556.44

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Solution

The fourth proportional to 976.12, 1,346.76 and 556.44 is: 767.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.12 : 1,346.76 = 556.44 : x
  2. Step 2: Convert to fraction form
    976.12/1,346.76 = 556.44/x
  3. Step 3: Cross multiply
    976.12x = 1,346.76 × 556.44
  4. Step 4: Simplify right side
    976.12x = 749,391.13
  5. Step 5: Solve for x
    x = 749,391.13/976.12
  6. Step 6: Final answer
    x = 767.72

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1.5x scale

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.