Home / 1,292.05-1,781.49-1,055.13

Finding the Fourth Proportional to 1,292.05, 1,781.49 and 1,055.13

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Solution

The fourth proportional to 1,292.05, 1,781.49 and 1,055.13 is: 1,454.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.05 : 1,781.49 = 1,055.13 : x
  2. Step 2: Convert to fraction form
    1,292.05/1,781.49 = 1,055.13/x
  3. Step 3: Cross multiply
    1,292.05x = 1,781.49 × 1,055.13
  4. Step 4: Simplify right side
    1,292.05x = 1,879,700.82
  5. Step 5: Solve for x
    x = 1,879,700.82/1,292.05
  6. Step 6: Final answer
    x = 1,454.82

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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.