Home / 1,858.45-2,565.49-1,187.13

Finding the Fourth Proportional to 1,858.45, 2,565.49 and 1,187.13

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Solution

The fourth proportional to 1,858.45, 2,565.49 and 1,187.13 is: 1,638.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,858.45 : 2,565.49 = 1,187.13 : x
  2. Step 2: Convert to fraction form
    1,858.45/2,565.49 = 1,187.13/x
  3. Step 3: Cross multiply
    1,858.45x = 2,565.49 × 1,187.13
  4. Step 4: Simplify right side
    1,858.45x = 3,045,570.14
  5. Step 5: Solve for x
    x = 3,045,570.14/1,858.45
  6. Step 6: Final answer
    x = 1,638.77

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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.