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Finding the Fourth Proportional to 771.17, 1,063.95 and 439.36

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Solution

The fourth proportional to 771.17, 1,063.95 and 439.36 is: 606.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.17 : 1,063.95 = 439.36 : x
  2. Step 2: Convert to fraction form
    771.17/1,063.95 = 439.36/x
  3. Step 3: Cross multiply
    771.17x = 1,063.95 × 439.36
  4. Step 4: Simplify right side
    771.17x = 467,455.24
  5. Step 5: Solve for x
    x = 467,455.24/771.17
  6. Step 6: Final answer
    x = 606.16

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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.