Home / 1,115.48-1,539.33-618.17

Finding the Fourth Proportional to 1,115.48, 1,539.33 and 618.17

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Solution

The fourth proportional to 1,115.48, 1,539.33 and 618.17 is: 853.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.48 : 1,539.33 = 618.17 : x
  2. Step 2: Convert to fraction form
    1,115.48/1,539.33 = 618.17/x
  3. Step 3: Cross multiply
    1,115.48x = 1,539.33 × 618.17
  4. Step 4: Simplify right side
    1,115.48x = 951,565.84
  5. Step 5: Solve for x
    x = 951,565.84/1,115.48
  6. Step 6: Final answer
    x = 853.05

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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.