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Finding the Fourth Proportional to 923.49, 1,280.95 and 890.24

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Solution

The fourth proportional to 923.49, 1,280.95 and 890.24 is: 1,234.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.49 : 1,280.95 = 890.24 : x
  2. Step 2: Convert to fraction form
    923.49/1,280.95 = 890.24/x
  3. Step 3: Cross multiply
    923.49x = 1,280.95 × 890.24
  4. Step 4: Simplify right side
    923.49x = 1,140,348.48
  5. Step 5: Solve for x
    x = 1,140,348.48/923.49
  6. Step 6: Final answer
    x = 1,234.82

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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.