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Finding the Fourth Proportional to 699.08, 964.38 and 478.04

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Solution

The fourth proportional to 699.08, 964.38 and 478.04 is: 659.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.08 : 964.38 = 478.04 : x
  2. Step 2: Convert to fraction form
    699.08/964.38 = 478.04/x
  3. Step 3: Cross multiply
    699.08x = 964.38 × 478.04
  4. Step 4: Simplify right side
    699.08x = 461,012.22
  5. Step 5: Solve for x
    x = 461,012.22/699.08
  6. Step 6: Final answer
    x = 659.46

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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.