Home / 1,451.08-2,002.47-787.92

Finding the Fourth Proportional to 1,451.08, 2,002.47 and 787.92

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Solution

The fourth proportional to 1,451.08, 2,002.47 and 787.92 is: 1,087.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.08 : 2,002.47 = 787.92 : x
  2. Step 2: Convert to fraction form
    1,451.08/2,002.47 = 787.92/x
  3. Step 3: Cross multiply
    1,451.08x = 2,002.47 × 787.92
  4. Step 4: Simplify right side
    1,451.08x = 1,577,786.16
  5. Step 5: Solve for x
    x = 1,577,786.16/1,451.08
  6. Step 6: Final answer
    x = 1,087.32

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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.