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Finding the Fourth Proportional to 708.34, 977.48 and 393.63

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Solution

The fourth proportional to 708.34, 977.48 and 393.63 is: 543.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.34 : 977.48 = 393.63 : x
  2. Step 2: Convert to fraction form
    708.34/977.48 = 393.63/x
  3. Step 3: Cross multiply
    708.34x = 977.48 × 393.63
  4. Step 4: Simplify right side
    708.34x = 384,763.01
  5. Step 5: Solve for x
    x = 384,763.01/708.34
  6. Step 6: Final answer
    x = 543.19

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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.