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Finding the Fourth Proportional to 1,078.77, 1,618.31 and 348.29

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Solution

The fourth proportional to 1,078.77, 1,618.31 and 348.29 is: 522.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.77 : 1,618.31 = 348.29 : x
  2. Step 2: Convert to fraction form
    1,078.77/1,618.31 = 348.29/x
  3. Step 3: Cross multiply
    1,078.77x = 1,618.31 × 348.29
  4. Step 4: Simplify right side
    1,078.77x = 563,631.36
  5. Step 5: Solve for x
    x = 563,631.36/1,078.77
  6. Step 6: Final answer
    x = 522.48

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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.