Home / 1,550.27-2,139.07-921.36

Finding the Fourth Proportional to 1,550.27, 2,139.07 and 921.36

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Solution

The fourth proportional to 1,550.27, 2,139.07 and 921.36 is: 1,271.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.27 : 2,139.07 = 921.36 : x
  2. Step 2: Convert to fraction form
    1,550.27/2,139.07 = 921.36/x
  3. Step 3: Cross multiply
    1,550.27x = 2,139.07 × 921.36
  4. Step 4: Simplify right side
    1,550.27x = 1,970,842.84
  5. Step 5: Solve for x
    x = 1,970,842.84/1,550.27
  6. Step 6: Final answer
    x = 1,271.29

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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.