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Finding the Fourth Proportional to 1,076.58, 1,613.78 and 345.62

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Solution

The fourth proportional to 1,076.58, 1,613.78 and 345.62 is: 518.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.58 : 1,613.78 = 345.62 : x
  2. Step 2: Convert to fraction form
    1,076.58/1,613.78 = 345.62/x
  3. Step 3: Cross multiply
    1,076.58x = 1,613.78 × 345.62
  4. Step 4: Simplify right side
    1,076.58x = 557,754.64
  5. Step 5: Solve for x
    x = 557,754.64/1,076.58
  6. Step 6: Final answer
    x = 518.08

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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.