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Finding the Fourth Proportional to 643.92, 965.72 and 370.52

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Solution

The fourth proportional to 643.92, 965.72 and 370.52 is: 555.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.92 : 965.72 = 370.52 : x
  2. Step 2: Convert to fraction form
    643.92/965.72 = 370.52/x
  3. Step 3: Cross multiply
    643.92x = 965.72 × 370.52
  4. Step 4: Simplify right side
    643.92x = 357,818.57
  5. Step 5: Solve for x
    x = 357,818.57/643.92
  6. Step 6: Final answer
    x = 555.69

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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.