Home / 1,521.22-2,280.39-905.08

Finding the Fourth Proportional to 1,521.22, 2,280.39 and 905.08

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Solution

The fourth proportional to 1,521.22, 2,280.39 and 905.08 is: 1,356.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.22 : 2,280.39 = 905.08 : x
  2. Step 2: Convert to fraction form
    1,521.22/2,280.39 = 905.08/x
  3. Step 3: Cross multiply
    1,521.22x = 2,280.39 × 905.08
  4. Step 4: Simplify right side
    1,521.22x = 2,063,935.38
  5. Step 5: Solve for x
    x = 2,063,935.38/1,521.22
  6. Step 6: Final answer
    x = 1,356.76

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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.