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Finding the Fourth Proportional to 1,224.11, 1,688.65 and 892.01

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Solution

The fourth proportional to 1,224.11, 1,688.65 and 892.01 is: 1,230.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,224.11 : 1,688.65 = 892.01 : x
  2. Step 2: Convert to fraction form
    1,224.11/1,688.65 = 892.01/x
  3. Step 3: Cross multiply
    1,224.11x = 1,688.65 × 892.01
  4. Step 4: Simplify right side
    1,224.11x = 1,506,294.68
  5. Step 5: Solve for x
    x = 1,506,294.68/1,224.11
  6. Step 6: Final answer
    x = 1,230.52

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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.