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Finding the Fourth Proportional to 350,213.28, 525,371.76 and 128,580

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Solution

The fourth proportional to 350,213.28, 525,371.76 and 128,580 is: 192,889.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    350,213.28 : 525,371.76 = 128,580 : x
  2. Step 2: Convert to fraction form
    350,213.28/525,371.76 = 128,580/x
  3. Step 3: Cross multiply
    350,213.28x = 525,371.76 × 128,580
  4. Step 4: Simplify right side
    350,213.28x = 67,552,300,900.80
  5. Step 5: Solve for x
    x = 67,552,300,900.80/350,213.28
  6. Step 6: Final answer
    x = 192,889.03

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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.