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Finding the Fourth Proportional to 945.20, 1,424.82 and 881.20

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Solution

The fourth proportional to 945.20, 1,424.82 and 881.20 is: 1,328.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.20 : 1,424.82 = 881.20 : x
  2. Step 2: Convert to fraction form
    945.20/1,424.82 = 881.20/x
  3. Step 3: Cross multiply
    945.20x = 1,424.82 × 881.20
  4. Step 4: Simplify right side
    945.20x = 1,255,551.38
  5. Step 5: Solve for x
    x = 1,255,551.38/945.20
  6. Step 6: Final answer
    x = 1,328.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.