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Finding the Fourth Proportional to 649.34, 895.76 and 439.53

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Solution

The fourth proportional to 649.34, 895.76 and 439.53 is: 606.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.34 : 895.76 = 439.53 : x
  2. Step 2: Convert to fraction form
    649.34/895.76 = 439.53/x
  3. Step 3: Cross multiply
    649.34x = 895.76 × 439.53
  4. Step 4: Simplify right side
    649.34x = 393,709.48
  5. Step 5: Solve for x
    x = 393,709.48/649.34
  6. Step 6: Final answer
    x = 606.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.