Home / 1,917.64-2,643.52-1,356.38

Finding the Fourth Proportional to 1,917.64, 2,643.52 and 1,356.38

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Solution

The fourth proportional to 1,917.64, 2,643.52 and 1,356.38 is: 1,869.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.64 : 2,643.52 = 1,356.38 : x
  2. Step 2: Convert to fraction form
    1,917.64/2,643.52 = 1,356.38/x
  3. Step 3: Cross multiply
    1,917.64x = 2,643.52 × 1,356.38
  4. Step 4: Simplify right side
    1,917.64x = 3,585,597.66
  5. Step 5: Solve for x
    x = 3,585,597.66/1,917.64
  6. Step 6: Final answer
    x = 1,869.80

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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.