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Finding the Fourth Proportional to 948.92, 1,309.12 and 669.56

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Solution

The fourth proportional to 948.92, 1,309.12 and 669.56 is: 923.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.92 : 1,309.12 = 669.56 : x
  2. Step 2: Convert to fraction form
    948.92/1,309.12 = 669.56/x
  3. Step 3: Cross multiply
    948.92x = 1,309.12 × 669.56
  4. Step 4: Simplify right side
    948.92x = 876,534.39
  5. Step 5: Solve for x
    x = 876,534.39/948.92
  6. Step 6: Final answer
    x = 923.72

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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.