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Finding the Fourth Proportional to 945.81, 1,304.87 and 552.69

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Solution

The fourth proportional to 945.81, 1,304.87 and 552.69 is: 762.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.81 : 1,304.87 = 552.69 : x
  2. Step 2: Convert to fraction form
    945.81/1,304.87 = 552.69/x
  3. Step 3: Cross multiply
    945.81x = 1,304.87 × 552.69
  4. Step 4: Simplify right side
    945.81x = 721,185.84
  5. Step 5: Solve for x
    x = 721,185.84/945.81
  6. Step 6: Final answer
    x = 762.51

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Double scale
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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.