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Finding the Fourth Proportional to 442,892.40, 664,338.60 and 285,428.40

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Solution

The fourth proportional to 442,892.40, 664,338.60 and 285,428.40 is: 428,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,892.40 : 664,338.60 = 285,428.40 : x
  2. Step 2: Convert to fraction form
    442,892.40/664,338.60 = 285,428.40/x
  3. Step 3: Cross multiply
    442,892.40x = 664,338.60 × 285,428.40
  4. Step 4: Simplify right side
    442,892.40x = 189,621,103,656.24
  5. Step 5: Solve for x
    x = 189,621,103,656.24/442,892.40
  6. Step 6: Final answer
    x = 428,142.60

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1.5x scale

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.