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Finding the Fourth Proportional to 1,202.48, 1,803.40 and 812.28

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Solution

The fourth proportional to 1,202.48, 1,803.40 and 812.28 is: 1,218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202.48 : 1,803.40 = 812.28 : x
  2. Step 2: Convert to fraction form
    1,202.48/1,803.40 = 812.28/x
  3. Step 3: Cross multiply
    1,202.48x = 1,803.40 × 812.28
  4. Step 4: Simplify right side
    1,202.48x = 1,464,865.75
  5. Step 5: Solve for x
    x = 1,464,865.75/1,202.48
  6. Step 6: Final answer
    x = 1,218.20

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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.