Home / 1,117.12-1,541.68-619.75

Finding the Fourth Proportional to 1,117.12, 1,541.68 and 619.75

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Solution

The fourth proportional to 1,117.12, 1,541.68 and 619.75 is: 855.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.12 : 1,541.68 = 619.75 : x
  2. Step 2: Convert to fraction form
    1,117.12/1,541.68 = 619.75/x
  3. Step 3: Cross multiply
    1,117.12x = 1,541.68 × 619.75
  4. Step 4: Simplify right side
    1,117.12x = 955,456.18
  5. Step 5: Solve for x
    x = 955,456.18/1,117.12
  6. Step 6: Final answer
    x = 855.29

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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.