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Finding the Fourth Proportional to 945.76, 1,304.94 and 552.60

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Solution

The fourth proportional to 945.76, 1,304.94 and 552.60 is: 762.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.76 : 1,304.94 = 552.60 : x
  2. Step 2: Convert to fraction form
    945.76/1,304.94 = 552.60/x
  3. Step 3: Cross multiply
    945.76x = 1,304.94 × 552.60
  4. Step 4: Simplify right side
    945.76x = 721,109.84
  5. Step 5: Solve for x
    x = 721,109.84/945.76
  6. Step 6: Final answer
    x = 762.47

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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.