Home / 1,246.78-1,719.64-1,089.08

Finding the Fourth Proportional to 1,246.78, 1,719.64 and 1,089.08

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Solution

The fourth proportional to 1,246.78, 1,719.64 and 1,089.08 is: 1,502.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.78 : 1,719.64 = 1,089.08 : x
  2. Step 2: Convert to fraction form
    1,246.78/1,719.64 = 1,089.08/x
  3. Step 3: Cross multiply
    1,246.78x = 1,719.64 × 1,089.08
  4. Step 4: Simplify right side
    1,246.78x = 1,872,824.74
  5. Step 5: Solve for x
    x = 1,872,824.74/1,246.78
  6. Step 6: Final answer
    x = 1,502.13

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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.