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Finding the Fourth Proportional to 350,428.80, 525,643.20 and 200,611.20

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Solution

The fourth proportional to 350,428.80, 525,643.20 and 200,611.20 is: 300,916.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    350,428.80 : 525,643.20 = 200,611.20 : x
  2. Step 2: Convert to fraction form
    350,428.80/525,643.20 = 200,611.20/x
  3. Step 3: Cross multiply
    350,428.80x = 525,643.20 × 200,611.20
  4. Step 4: Simplify right side
    350,428.80x = 105,449,913,123.84
  5. Step 5: Solve for x
    x = 105,449,913,123.84/350,428.80
  6. Step 6: Final answer
    x = 300,916.80

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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.