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Finding the Fourth Proportional to 615.28, 847.02 and 579.64

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Solution

The fourth proportional to 615.28, 847.02 and 579.64 is: 797.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.28 : 847.02 = 579.64 : x
  2. Step 2: Convert to fraction form
    615.28/847.02 = 579.64/x
  3. Step 3: Cross multiply
    615.28x = 847.02 × 579.64
  4. Step 4: Simplify right side
    615.28x = 490,966.67
  5. Step 5: Solve for x
    x = 490,966.67/615.28
  6. Step 6: Final answer
    x = 797.96

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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.