Home / 1,292.25-1,781.64-1,055.95

Finding the Fourth Proportional to 1,292.25, 1,781.64 and 1,055.95

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Solution

The fourth proportional to 1,292.25, 1,781.64 and 1,055.95 is: 1,455.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.25 : 1,781.64 = 1,055.95 : x
  2. Step 2: Convert to fraction form
    1,292.25/1,781.64 = 1,055.95/x
  3. Step 3: Cross multiply
    1,292.25x = 1,781.64 × 1,055.95
  4. Step 4: Simplify right side
    1,292.25x = 1,881,322.76
  5. Step 5: Solve for x
    x = 1,881,322.76/1,292.25
  6. Step 6: Final answer
    x = 1,455.85

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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.