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Finding the Fourth Proportional to 1,078.26, 1,617.63 and 347.88

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Solution

The fourth proportional to 1,078.26, 1,617.63 and 347.88 is: 521.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.26 : 1,617.63 = 347.88 : x
  2. Step 2: Convert to fraction form
    1,078.26/1,617.63 = 347.88/x
  3. Step 3: Cross multiply
    1,078.26x = 1,617.63 × 347.88
  4. Step 4: Simplify right side
    1,078.26x = 562,741.12
  5. Step 5: Solve for x
    x = 562,741.12/1,078.26
  6. Step 6: Final answer
    x = 521.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.