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Finding the Fourth Proportional to 801.37, 1,105.54 and 469.81

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Solution

The fourth proportional to 801.37, 1,105.54 and 469.81 is: 648.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.37 : 1,105.54 = 469.81 : x
  2. Step 2: Convert to fraction form
    801.37/1,105.54 = 469.81/x
  3. Step 3: Cross multiply
    801.37x = 1,105.54 × 469.81
  4. Step 4: Simplify right side
    801.37x = 519,393.75
  5. Step 5: Solve for x
    x = 519,393.75/801.37
  6. Step 6: Final answer
    x = 648.13

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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.