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Finding the Fourth Proportional to 703.78, 971.20 and 409.08

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Solution

The fourth proportional to 703.78, 971.20 and 409.08 is: 564.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.78 : 971.20 = 409.08 : x
  2. Step 2: Convert to fraction form
    703.78/971.20 = 409.08/x
  3. Step 3: Cross multiply
    703.78x = 971.20 × 409.08
  4. Step 4: Simplify right side
    703.78x = 397,298.50
  5. Step 5: Solve for x
    x = 397,298.50/703.78
  6. Step 6: Final answer
    x = 564.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.