Home / 1,115.36-1,539.18-618.00

Finding the Fourth Proportional to 1,115.36, 1,539.18 and 618.00

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Solution

The fourth proportional to 1,115.36, 1,539.18 and 618.00 is: 852.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.36 : 1,539.18 = 618.00 : x
  2. Step 2: Convert to fraction form
    1,115.36/1,539.18 = 618.00/x
  3. Step 3: Cross multiply
    1,115.36x = 1,539.18 × 618.00
  4. Step 4: Simplify right side
    1,115.36x = 951,207.47
  5. Step 5: Solve for x
    x = 951,207.47/1,115.36
  6. Step 6: Final answer
    x = 852.83

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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.