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Finding the Fourth Proportional to 649.76, 896.63 and 355.01

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Solution

The fourth proportional to 649.76, 896.63 and 355.01 is: 489.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.76 : 896.63 = 355.01 : x
  2. Step 2: Convert to fraction form
    649.76/896.63 = 355.01/x
  3. Step 3: Cross multiply
    649.76x = 896.63 × 355.01
  4. Step 4: Simplify right side
    649.76x = 318,306.36
  5. Step 5: Solve for x
    x = 318,306.36/649.76
  6. Step 6: Final answer
    x = 489.89

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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.