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Finding the Fourth Proportional to 705.90, 1,058.71 and 243.64

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Solution

The fourth proportional to 705.90, 1,058.71 and 243.64 is: 365.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.90 : 1,058.71 = 243.64 : x
  2. Step 2: Convert to fraction form
    705.90/1,058.71 = 243.64/x
  3. Step 3: Cross multiply
    705.90x = 1,058.71 × 243.64
  4. Step 4: Simplify right side
    705.90x = 257,944.10
  5. Step 5: Solve for x
    x = 257,944.10/705.90
  6. Step 6: Final answer
    x = 365.41

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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.