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Finding the Fourth Proportional to 945.60, 1,304.88 and 552.48

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Solution

The fourth proportional to 945.60, 1,304.88 and 552.48 is: 762.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.60 : 1,304.88 = 552.48 : x
  2. Step 2: Convert to fraction form
    945.60/1,304.88 = 552.48/x
  3. Step 3: Cross multiply
    945.60x = 1,304.88 × 552.48
  4. Step 4: Simplify right side
    945.60x = 720,920.10
  5. Step 5: Solve for x
    x = 720,920.10/945.60
  6. Step 6: Final answer
    x = 762.39

Related Problems

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Half scale
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Double scale
Find fourth proportional to 946.60, 1,306.26 and 553.48
Similar ratio
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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.