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Finding the Fourth Proportional to 699.71, 964.88 and 489.82

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Solution

The fourth proportional to 699.71, 964.88 and 489.82 is: 675.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.71 : 964.88 = 489.82 : x
  2. Step 2: Convert to fraction form
    699.71/964.88 = 489.82/x
  3. Step 3: Cross multiply
    699.71x = 964.88 × 489.82
  4. Step 4: Simplify right side
    699.71x = 472,612.70
  5. Step 5: Solve for x
    x = 472,612.70/699.71
  6. Step 6: Final answer
    x = 675.45

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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.