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Finding the Fourth Proportional to 735.36, 1,015.62 and 665.40

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Solution

The fourth proportional to 735.36, 1,015.62 and 665.40 is: 919.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.36 : 1,015.62 = 665.40 : x
  2. Step 2: Convert to fraction form
    735.36/1,015.62 = 665.40/x
  3. Step 3: Cross multiply
    735.36x = 1,015.62 × 665.40
  4. Step 4: Simplify right side
    735.36x = 675,793.55
  5. Step 5: Solve for x
    x = 675,793.55/735.36
  6. Step 6: Final answer
    x = 919.00

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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.