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Finding the Fourth Proportional to 680.54, 936.90 and 569.84

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Solution

The fourth proportional to 680.54, 936.90 and 569.84 is: 784.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.54 : 936.90 = 569.84 : x
  2. Step 2: Convert to fraction form
    680.54/936.90 = 569.84/x
  3. Step 3: Cross multiply
    680.54x = 936.90 × 569.84
  4. Step 4: Simplify right side
    680.54x = 533,878.41
  5. Step 5: Solve for x
    x = 533,878.41/680.54
  6. Step 6: Final answer
    x = 784.50

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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.