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Finding the Fourth Proportional to 1,201.98, 1,802.13 and 615.84

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Solution

The fourth proportional to 1,201.98, 1,802.13 and 615.84 is: 923.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.98 : 1,802.13 = 615.84 : x
  2. Step 2: Convert to fraction form
    1,201.98/1,802.13 = 615.84/x
  3. Step 3: Cross multiply
    1,201.98x = 1,802.13 × 615.84
  4. Step 4: Simplify right side
    1,201.98x = 1,109,823.74
  5. Step 5: Solve for x
    x = 1,109,823.74/1,201.98
  6. Step 6: Final answer
    x = 923.33

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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.