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Finding the Fourth Proportional to 716.58, 989.10 and 483.84

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Solution

The fourth proportional to 716.58, 989.10 and 483.84 is: 667.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.58 : 989.10 = 483.84 : x
  2. Step 2: Convert to fraction form
    716.58/989.10 = 483.84/x
  3. Step 3: Cross multiply
    716.58x = 989.10 × 483.84
  4. Step 4: Simplify right side
    716.58x = 478,566.14
  5. Step 5: Solve for x
    x = 478,566.14/716.58
  6. Step 6: Final answer
    x = 667.85

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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.