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Finding the Fourth Proportional to 795, 1,098 and 665.40

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Solution

The fourth proportional to 795, 1,098 and 665.40 is: 919.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    795 : 1,098 = 665.40 : x
  2. Step 2: Convert to fraction form
    795/1,098 = 665.40/x
  3. Step 3: Cross multiply
    795x = 1,098 × 665.40
  4. Step 4: Simplify right side
    795x = 730,609.20
  5. Step 5: Solve for x
    x = 730,609.20/795
  6. Step 6: Final answer
    x = 919.01

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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.