Home / 1,218.78-1,677.06-1,125.83

Finding the Fourth Proportional to 1,218.78, 1,677.06 and 1,125.83

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Solution

The fourth proportional to 1,218.78, 1,677.06 and 1,125.83 is: 1,549.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.78 : 1,677.06 = 1,125.83 : x
  2. Step 2: Convert to fraction form
    1,218.78/1,677.06 = 1,125.83/x
  3. Step 3: Cross multiply
    1,218.78x = 1,677.06 × 1,125.83
  4. Step 4: Simplify right side
    1,218.78x = 1,888,088.65
  5. Step 5: Solve for x
    x = 1,888,088.65/1,218.78
  6. Step 6: Final answer
    x = 1,549.16

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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.