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Finding the Fourth Proportional to 615.99, 847.80 and 491.25

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Solution

The fourth proportional to 615.99, 847.80 and 491.25 is: 676.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.99 : 847.80 = 491.25 : x
  2. Step 2: Convert to fraction form
    615.99/847.80 = 491.25/x
  3. Step 3: Cross multiply
    615.99x = 847.80 × 491.25
  4. Step 4: Simplify right side
    615.99x = 416,481.75
  5. Step 5: Solve for x
    x = 416,481.75/615.99
  6. Step 6: Final answer
    x = 676.12

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.