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Finding the Fourth Proportional to 303,428.20, 455,487.90 and 178,839.40

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Solution

The fourth proportional to 303,428.20, 455,487.90 and 178,839.40 is: 268,462.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,428.20 : 455,487.90 = 178,839.40 : x
  2. Step 2: Convert to fraction form
    303,428.20/455,487.90 = 178,839.40/x
  3. Step 3: Cross multiply
    303,428.20x = 455,487.90 × 178,839.40
  4. Step 4: Simplify right side
    303,428.20x = 81,459,182,743.26
  5. Step 5: Solve for x
    x = 81,459,182,743.26/303,428.20
  6. Step 6: Final answer
    x = 268,462.80

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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.