Home / 1,220.70-1,831.05-1,134.30

Finding the Fourth Proportional to 1,220.70, 1,831.05 and 1,134.30

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Solution

The fourth proportional to 1,220.70, 1,831.05 and 1,134.30 is: 1,701.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.70 : 1,831.05 = 1,134.30 : x
  2. Step 2: Convert to fraction form
    1,220.70/1,831.05 = 1,134.30/x
  3. Step 3: Cross multiply
    1,220.70x = 1,831.05 × 1,134.30
  4. Step 4: Simplify right side
    1,220.70x = 2,076,960.02
  5. Step 5: Solve for x
    x = 2,076,960.02/1,220.70
  6. Step 6: Final answer
    x = 1,701.45

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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.