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Finding the Fourth Proportional to 699.61, 965.76 and 479.69

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Solution

The fourth proportional to 699.61, 965.76 and 479.69 is: 662.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.61 : 965.76 = 479.69 : x
  2. Step 2: Convert to fraction form
    699.61/965.76 = 479.69/x
  3. Step 3: Cross multiply
    699.61x = 965.76 × 479.69
  4. Step 4: Simplify right side
    699.61x = 463,265.41
  5. Step 5: Solve for x
    x = 463,265.41/699.61
  6. Step 6: Final answer
    x = 662.18

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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.