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Finding the Fourth Proportional to 699.15, 964.66 and 419.41

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Solution

The fourth proportional to 699.15, 964.66 and 419.41 is: 578.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.15 : 964.66 = 419.41 : x
  2. Step 2: Convert to fraction form
    699.15/964.66 = 419.41/x
  3. Step 3: Cross multiply
    699.15x = 964.66 × 419.41
  4. Step 4: Simplify right side
    699.15x = 404,581.13
  5. Step 5: Solve for x
    x = 404,581.13/699.15
  6. Step 6: Final answer
    x = 578.68

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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.