Home / 1,115.51-1,539.38-618.15

Finding the Fourth Proportional to 1,115.51, 1,539.38 and 618.15

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Solution

The fourth proportional to 1,115.51, 1,539.38 and 618.15 is: 853.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.51 : 1,539.38 = 618.15 : x
  2. Step 2: Convert to fraction form
    1,115.51/1,539.38 = 618.15/x
  3. Step 3: Cross multiply
    1,115.51x = 1,539.38 × 618.15
  4. Step 4: Simplify right side
    1,115.51x = 951,567.75
  5. Step 5: Solve for x
    x = 951,567.75/1,115.51
  6. Step 6: Final answer
    x = 853.03

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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.