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Finding the Fourth Proportional to 860.80, 1,291.20 and 244.51

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Solution

The fourth proportional to 860.80, 1,291.20 and 244.51 is: 366.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.80 : 1,291.20 = 244.51 : x
  2. Step 2: Convert to fraction form
    860.80/1,291.20 = 244.51/x
  3. Step 3: Cross multiply
    860.80x = 1,291.20 × 244.51
  4. Step 4: Simplify right side
    860.80x = 315,711.31
  5. Step 5: Solve for x
    x = 315,711.31/860.80
  6. Step 6: Final answer
    x = 366.77

Related Problems

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Double scale
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Similar ratio
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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.