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Finding the Fourth Proportional to 615.58, 849.09 and 491.02

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Solution

The fourth proportional to 615.58, 849.09 and 491.02 is: 677.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.58 : 849.09 = 491.02 : x
  2. Step 2: Convert to fraction form
    615.58/849.09 = 491.02/x
  3. Step 3: Cross multiply
    615.58x = 849.09 × 491.02
  4. Step 4: Simplify right side
    615.58x = 416,920.17
  5. Step 5: Solve for x
    x = 416,920.17/615.58
  6. Step 6: Final answer
    x = 677.28

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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.