Home / 1,115.07-1,538.82-617.70

Finding the Fourth Proportional to 1,115.07, 1,538.82 and 617.70

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Solution

The fourth proportional to 1,115.07, 1,538.82 and 617.70 is: 852.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.07 : 1,538.82 = 617.70 : x
  2. Step 2: Convert to fraction form
    1,115.07/1,538.82 = 617.70/x
  3. Step 3: Cross multiply
    1,115.07x = 1,538.82 × 617.70
  4. Step 4: Simplify right side
    1,115.07x = 950,529.11
  5. Step 5: Solve for x
    x = 950,529.11/1,115.07
  6. Step 6: Final answer
    x = 852.44

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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.