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Finding the Fourth Proportional to 1,122.60, 1,683.60 and 472.96

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Solution

The fourth proportional to 1,122.60, 1,683.60 and 472.96 is: 709.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.60 : 1,683.60 = 472.96 : x
  2. Step 2: Convert to fraction form
    1,122.60/1,683.60 = 472.96/x
  3. Step 3: Cross multiply
    1,122.60x = 1,683.60 × 472.96
  4. Step 4: Simplify right side
    1,122.60x = 796,275.46
  5. Step 5: Solve for x
    x = 796,275.46/1,122.60
  6. Step 6: Final answer
    x = 709.31

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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.