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Finding the Fourth Proportional to 1,201.68, 1,802.79 and 471.74

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Solution

The fourth proportional to 1,201.68, 1,802.79 and 471.74 is: 707.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.68 : 1,802.79 = 471.74 : x
  2. Step 2: Convert to fraction form
    1,201.68/1,802.79 = 471.74/x
  3. Step 3: Cross multiply
    1,201.68x = 1,802.79 × 471.74
  4. Step 4: Simplify right side
    1,201.68x = 850,439.14
  5. Step 5: Solve for x
    x = 850,439.14/1,201.68
  6. Step 6: Final answer
    x = 707.71

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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.