Home / 1,115.18-1,538.79-617.82

Finding the Fourth Proportional to 1,115.18, 1,538.79 and 617.82

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Solution

The fourth proportional to 1,115.18, 1,538.79 and 617.82 is: 852.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.18 : 1,538.79 = 617.82 : x
  2. Step 2: Convert to fraction form
    1,115.18/1,538.79 = 617.82/x
  3. Step 3: Cross multiply
    1,115.18x = 1,538.79 × 617.82
  4. Step 4: Simplify right side
    1,115.18x = 950,695.24
  5. Step 5: Solve for x
    x = 950,695.24/1,115.18
  6. Step 6: Final answer
    x = 852.50

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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.