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Finding the Fourth Proportional to 716.74, 989.94 and 569.11

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Solution

The fourth proportional to 716.74, 989.94 and 569.11 is: 786.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.74 : 989.94 = 569.11 : x
  2. Step 2: Convert to fraction form
    716.74/989.94 = 569.11/x
  3. Step 3: Cross multiply
    716.74x = 989.94 × 569.11
  4. Step 4: Simplify right side
    716.74x = 563,384.75
  5. Step 5: Solve for x
    x = 563,384.75/716.74
  6. Step 6: Final answer
    x = 786.04

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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.