Home / 1,550.36-2,139.28-887.12

Finding the Fourth Proportional to 1,550.36, 2,139.28 and 887.12

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Solution

The fourth proportional to 1,550.36, 2,139.28 and 887.12 is: 1,224.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.36 : 2,139.28 = 887.12 : x
  2. Step 2: Convert to fraction form
    1,550.36/2,139.28 = 887.12/x
  3. Step 3: Cross multiply
    1,550.36x = 2,139.28 × 887.12
  4. Step 4: Simplify right side
    1,550.36x = 1,897,798.07
  5. Step 5: Solve for x
    x = 1,897,798.07/1,550.36
  6. Step 6: Final answer
    x = 1,224.10

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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.