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Finding the Fourth Proportional to 708.86, 978.39 and 541.25

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Solution

The fourth proportional to 708.86, 978.39 and 541.25 is: 747.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.86 : 978.39 = 541.25 : x
  2. Step 2: Convert to fraction form
    708.86/978.39 = 541.25/x
  3. Step 3: Cross multiply
    708.86x = 978.39 × 541.25
  4. Step 4: Simplify right side
    708.86x = 529,553.59
  5. Step 5: Solve for x
    x = 529,553.59/708.86
  6. Step 6: Final answer
    x = 747.05

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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.