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Finding the Fourth Proportional to 1,078.12, 1,478.11 and 1,058.68

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Solution

The fourth proportional to 1,078.12, 1,478.11 and 1,058.68 is: 1,451.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.12 : 1,478.11 = 1,058.68 : x
  2. Step 2: Convert to fraction form
    1,078.12/1,478.11 = 1,058.68/x
  3. Step 3: Cross multiply
    1,078.12x = 1,478.11 × 1,058.68
  4. Step 4: Simplify right side
    1,078.12x = 1,564,845.49
  5. Step 5: Solve for x
    x = 1,564,845.49/1,078.12
  6. Step 6: Final answer
    x = 1,451.46

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.