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Finding the Fourth Proportional to 923.85, 1,280.41 and 906.57

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Solution

The fourth proportional to 923.85, 1,280.41 and 906.57 is: 1,256.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.85 : 1,280.41 = 906.57 : x
  2. Step 2: Convert to fraction form
    923.85/1,280.41 = 906.57/x
  3. Step 3: Cross multiply
    923.85x = 1,280.41 × 906.57
  4. Step 4: Simplify right side
    923.85x = 1,160,781.29
  5. Step 5: Solve for x
    x = 1,160,781.29/923.85
  6. Step 6: Final answer
    x = 1,256.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.