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Finding the Fourth Proportional to 1,550.39, 2,139.54 and 887.23

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Solution

The fourth proportional to 1,550.39, 2,139.54 and 887.23 is: 1,224.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.39 : 2,139.54 = 887.23 : x
  2. Step 2: Convert to fraction form
    1,550.39/2,139.54 = 887.23/x
  3. Step 3: Cross multiply
    1,550.39x = 2,139.54 × 887.23
  4. Step 4: Simplify right side
    1,550.39x = 1,898,259.90
  5. Step 5: Solve for x
    x = 1,898,259.90/1,550.39
  6. Step 6: Final answer
    x = 1,224.38

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Double scale
Find fourth proportional to 1,551.39, 2,140.92 and 888.23
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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.