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Finding the Fourth Proportional to 649.18, 973.29 and 392.62

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Solution

The fourth proportional to 649.18, 973.29 and 392.62 is: 588.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.18 : 973.29 = 392.62 : x
  2. Step 2: Convert to fraction form
    649.18/973.29 = 392.62/x
  3. Step 3: Cross multiply
    649.18x = 973.29 × 392.62
  4. Step 4: Simplify right side
    649.18x = 382,133.12
  5. Step 5: Solve for x
    x = 382,133.12/649.18
  6. Step 6: Final answer
    x = 588.64

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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.