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Finding the Fourth Proportional to 1,122.46, 1,684.14 and 574.84

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Solution

The fourth proportional to 1,122.46, 1,684.14 and 574.84 is: 862.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.46 : 1,684.14 = 574.84 : x
  2. Step 2: Convert to fraction form
    1,122.46/1,684.14 = 574.84/x
  3. Step 3: Cross multiply
    1,122.46x = 1,684.14 × 574.84
  4. Step 4: Simplify right side
    1,122.46x = 968,111.04
  5. Step 5: Solve for x
    x = 968,111.04/1,122.46
  6. Step 6: Final answer
    x = 862.49

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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.