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Finding the Fourth Proportional to 698.99, 964.98 and 478.26

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Solution

The fourth proportional to 698.99, 964.98 and 478.26 is: 660.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.99 : 964.98 = 478.26 : x
  2. Step 2: Convert to fraction form
    698.99/964.98 = 478.26/x
  3. Step 3: Cross multiply
    698.99x = 964.98 × 478.26
  4. Step 4: Simplify right side
    698.99x = 461,511.33
  5. Step 5: Solve for x
    x = 461,511.33/698.99
  6. Step 6: Final answer
    x = 660.26

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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.