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Finding the Fourth Proportional to 308,428.80, 462,643.20 and 190,233.60

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Solution

The fourth proportional to 308,428.80, 462,643.20 and 190,233.60 is: 285,350.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,428.80 : 462,643.20 = 190,233.60 : x
  2. Step 2: Convert to fraction form
    308,428.80/462,643.20 = 190,233.60/x
  3. Step 3: Cross multiply
    308,428.80x = 462,643.20 × 190,233.60
  4. Step 4: Simplify right side
    308,428.80x = 88,010,281,451.52
  5. Step 5: Solve for x
    x = 88,010,281,451.52/308,428.80
  6. Step 6: Final answer
    x = 285,350.40

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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.