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Finding the Fourth Proportional to 1,220.76, 1,684.26 and 801.18

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Solution

The fourth proportional to 1,220.76, 1,684.26 and 801.18 is: 1,105.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.76 : 1,684.26 = 801.18 : x
  2. Step 2: Convert to fraction form
    1,220.76/1,684.26 = 801.18/x
  3. Step 3: Cross multiply
    1,220.76x = 1,684.26 × 801.18
  4. Step 4: Simplify right side
    1,220.76x = 1,349,395.43
  5. Step 5: Solve for x
    x = 1,349,395.43/1,220.76
  6. Step 6: Final answer
    x = 1,105.37

Related Problems

Find fourth proportional to 610.38, 842.13 and 400.59
Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.