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Finding the Fourth Proportional to 708.17, 977.33 and 393.46

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Solution

The fourth proportional to 708.17, 977.33 and 393.46 is: 543.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.17 : 977.33 = 393.46 : x
  2. Step 2: Convert to fraction form
    708.17/977.33 = 393.46/x
  3. Step 3: Cross multiply
    708.17x = 977.33 × 393.46
  4. Step 4: Simplify right side
    708.17x = 384,540.26
  5. Step 5: Solve for x
    x = 384,540.26/708.17
  6. Step 6: Final answer
    x = 543.01

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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.