Home / 1,521.09-2,280.86-741.13

Finding the Fourth Proportional to 1,521.09, 2,280.86 and 741.13

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Solution

The fourth proportional to 1,521.09, 2,280.86 and 741.13 is: 1,111.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.09 : 2,280.86 = 741.13 : x
  2. Step 2: Convert to fraction form
    1,521.09/2,280.86 = 741.13/x
  3. Step 3: Cross multiply
    1,521.09x = 2,280.86 × 741.13
  4. Step 4: Simplify right side
    1,521.09x = 1,690,415.62
  5. Step 5: Solve for x
    x = 1,690,415.62/1,521.09
  6. Step 6: Final answer
    x = 1,111.32

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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.