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Finding the Fourth Proportional to 876.50, 1,314.89 and 260.27

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Solution

The fourth proportional to 876.50, 1,314.89 and 260.27 is: 390.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.50 : 1,314.89 = 260.27 : x
  2. Step 2: Convert to fraction form
    876.50/1,314.89 = 260.27/x
  3. Step 3: Cross multiply
    876.50x = 1,314.89 × 260.27
  4. Step 4: Simplify right side
    876.50x = 342,218.54
  5. Step 5: Solve for x
    x = 342,218.54/876.50
  6. Step 6: Final answer
    x = 390.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.