Home / 3,386.39-5,079.69-921.27

Finding the Fourth Proportional to 3,386.39, 5,079.69 and 921.27

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Solution

The fourth proportional to 3,386.39, 5,079.69 and 921.27 is: 1,381.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,386.39 : 5,079.69 = 921.27 : x
  2. Step 2: Convert to fraction form
    3,386.39/5,079.69 = 921.27/x
  3. Step 3: Cross multiply
    3,386.39x = 5,079.69 × 921.27
  4. Step 4: Simplify right side
    3,386.39x = 4,679,766.01
  5. Step 5: Solve for x
    x = 4,679,766.01/3,386.39
  6. Step 6: Final answer
    x = 1,381.93

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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.