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Finding the Fourth Proportional to 220,510.60, 303,982.53 and 155,865.79

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Solution

The fourth proportional to 220,510.60, 303,982.53 and 155,865.79 is: 214,867.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,510.60 : 303,982.53 = 155,865.79 : x
  2. Step 2: Convert to fraction form
    220,510.60/303,982.53 = 155,865.79/x
  3. Step 3: Cross multiply
    220,510.60x = 303,982.53 × 155,865.79
  4. Step 4: Simplify right side
    220,510.60x = 47,380,476,424.69
  5. Step 5: Solve for x
    x = 47,380,476,424.69/220,510.60
  6. Step 6: Final answer
    x = 214,867.12

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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.