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Finding the Fourth Proportional to 914.54, 1,260.17 and 815.24

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Solution

The fourth proportional to 914.54, 1,260.17 and 815.24 is: 1,123.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.54 : 1,260.17 = 815.24 : x
  2. Step 2: Convert to fraction form
    914.54/1,260.17 = 815.24/x
  3. Step 3: Cross multiply
    914.54x = 1,260.17 × 815.24
  4. Step 4: Simplify right side
    914.54x = 1,027,340.99
  5. Step 5: Solve for x
    x = 1,027,340.99/914.54
  6. Step 6: Final answer
    x = 1,123.34

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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.