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Finding the Fourth Proportional to 699.02, 963.66 and 478.50

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Solution

The fourth proportional to 699.02, 963.66 and 478.50 is: 659.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.02 : 963.66 = 478.50 : x
  2. Step 2: Convert to fraction form
    699.02/963.66 = 478.50/x
  3. Step 3: Cross multiply
    699.02x = 963.66 × 478.50
  4. Step 4: Simplify right side
    699.02x = 461,111.31
  5. Step 5: Solve for x
    x = 461,111.31/699.02
  6. Step 6: Final answer
    x = 659.65

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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.