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Finding the Fourth Proportional to 1,220.76, 1,831.14 and 976.14

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Solution

The fourth proportional to 1,220.76, 1,831.14 and 976.14 is: 1,464.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.76 : 1,831.14 = 976.14 : x
  2. Step 2: Convert to fraction form
    1,220.76/1,831.14 = 976.14/x
  3. Step 3: Cross multiply
    1,220.76x = 1,831.14 × 976.14
  4. Step 4: Simplify right side
    1,220.76x = 1,787,449.00
  5. Step 5: Solve for x
    x = 1,787,449.00/1,220.76
  6. Step 6: Final answer
    x = 1,464.21

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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.