Home / 1,115.06-1,538.80-617.71

Finding the Fourth Proportional to 1,115.06, 1,538.80 and 617.71

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Solution

The fourth proportional to 1,115.06, 1,538.80 and 617.71 is: 852.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.06 : 1,538.80 = 617.71 : x
  2. Step 2: Convert to fraction form
    1,115.06/1,538.80 = 617.71/x
  3. Step 3: Cross multiply
    1,115.06x = 1,538.80 × 617.71
  4. Step 4: Simplify right side
    1,115.06x = 950,531.76
  5. Step 5: Solve for x
    x = 950,531.76/1,115.06
  6. Step 6: Final answer
    x = 852.45

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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.