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Finding the Fourth Proportional to 665.08, 998.30 and 563.40

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Solution

The fourth proportional to 665.08, 998.30 and 563.40 is: 845.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.08 : 998.30 = 563.40 : x
  2. Step 2: Convert to fraction form
    665.08/998.30 = 563.40/x
  3. Step 3: Cross multiply
    665.08x = 998.30 × 563.40
  4. Step 4: Simplify right side
    665.08x = 562,442.22
  5. Step 5: Solve for x
    x = 562,442.22/665.08
  6. Step 6: Final answer
    x = 845.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.