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Finding the Fourth Proportional to 1,122.06, 1,681.50 and 574.62

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Solution

The fourth proportional to 1,122.06, 1,681.50 and 574.62 is: 861.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.06 : 1,681.50 = 574.62 : x
  2. Step 2: Convert to fraction form
    1,122.06/1,681.50 = 574.62/x
  3. Step 3: Cross multiply
    1,122.06x = 1,681.50 × 574.62
  4. Step 4: Simplify right side
    1,122.06x = 966,223.53
  5. Step 5: Solve for x
    x = 966,223.53/1,122.06
  6. Step 6: Final answer
    x = 861.12

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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.