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Finding the Fourth Proportional to 649.71, 972.36 and 375.39

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Solution

The fourth proportional to 649.71, 972.36 and 375.39 is: 561.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.71 : 972.36 = 375.39 : x
  2. Step 2: Convert to fraction form
    649.71/972.36 = 375.39/x
  3. Step 3: Cross multiply
    649.71x = 972.36 × 375.39
  4. Step 4: Simplify right side
    649.71x = 365,014.22
  5. Step 5: Solve for x
    x = 365,014.22/649.71
  6. Step 6: Final answer
    x = 561.81

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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.