Home / 1,276.79-1,921.91-1,088.87

Finding the Fourth Proportional to 1,276.79, 1,921.91 and 1,088.87

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Solution

The fourth proportional to 1,276.79, 1,921.91 and 1,088.87 is: 1,639.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.79 : 1,921.91 = 1,088.87 : x
  2. Step 2: Convert to fraction form
    1,276.79/1,921.91 = 1,088.87/x
  3. Step 3: Cross multiply
    1,276.79x = 1,921.91 × 1,088.87
  4. Step 4: Simplify right side
    1,276.79x = 2,092,695.09
  5. Step 5: Solve for x
    x = 2,092,695.09/1,276.79
  6. Step 6: Final answer
    x = 1,639.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.