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Finding the Fourth Proportional to 974.16, 1,343.56 and 708.20

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Solution

The fourth proportional to 974.16, 1,343.56 and 708.20 is: 976.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.16 : 1,343.56 = 708.20 : x
  2. Step 2: Convert to fraction form
    974.16/1,343.56 = 708.20/x
  3. Step 3: Cross multiply
    974.16x = 1,343.56 × 708.20
  4. Step 4: Simplify right side
    974.16x = 951,509.19
  5. Step 5: Solve for x
    x = 951,509.19/974.16
  6. Step 6: Final answer
    x = 976.75

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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.