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Finding the Fourth Proportional to 642.77, 963.30 and 350.39

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Solution

The fourth proportional to 642.77, 963.30 and 350.39 is: 525.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.77 : 963.30 = 350.39 : x
  2. Step 2: Convert to fraction form
    642.77/963.30 = 350.39/x
  3. Step 3: Cross multiply
    642.77x = 963.30 × 350.39
  4. Step 4: Simplify right side
    642.77x = 337,533.10
  5. Step 5: Solve for x
    x = 337,533.10/642.77
  6. Step 6: Final answer
    x = 525.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.