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Finding the Fourth Proportional to 649.18, 973.95 and 320.32

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Solution

The fourth proportional to 649.18, 973.95 and 320.32 is: 480.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.18 : 973.95 = 320.32 : x
  2. Step 2: Convert to fraction form
    649.18/973.95 = 320.32/x
  3. Step 3: Cross multiply
    649.18x = 973.95 × 320.32
  4. Step 4: Simplify right side
    649.18x = 311,975.66
  5. Step 5: Solve for x
    x = 311,975.66/649.18
  6. Step 6: Final answer
    x = 480.57

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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.