Home / 1,538.02-2,122.62-908.75

Finding the Fourth Proportional to 1,538.02, 2,122.62 and 908.75

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Solution

The fourth proportional to 1,538.02, 2,122.62 and 908.75 is: 1,254.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.02 : 2,122.62 = 908.75 : x
  2. Step 2: Convert to fraction form
    1,538.02/2,122.62 = 908.75/x
  3. Step 3: Cross multiply
    1,538.02x = 2,122.62 × 908.75
  4. Step 4: Simplify right side
    1,538.02x = 1,928,930.93
  5. Step 5: Solve for x
    x = 1,928,930.93/1,538.02
  6. Step 6: Final answer
    x = 1,254.17

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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.