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Finding the Fourth Proportional to 1,111.19, 1,533.41 and 613.81

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Solution

The fourth proportional to 1,111.19, 1,533.41 and 613.81 is: 847.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.19 : 1,533.41 = 613.81 : x
  2. Step 2: Convert to fraction form
    1,111.19/1,533.41 = 613.81/x
  3. Step 3: Cross multiply
    1,111.19x = 1,533.41 × 613.81
  4. Step 4: Simplify right side
    1,111.19x = 941,214.73
  5. Step 5: Solve for x
    x = 941,214.73/1,111.19
  6. Step 6: Final answer
    x = 847.03

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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.