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Finding the Fourth Proportional to 285,227.20, 427,807.86 and 74,881.60

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Solution

The fourth proportional to 285,227.20, 427,807.86 and 74,881.60 is: 112,313.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,227.20 : 427,807.86 = 74,881.60 : x
  2. Step 2: Convert to fraction form
    285,227.20/427,807.86 = 74,881.60/x
  3. Step 3: Cross multiply
    285,227.20x = 427,807.86 × 74,881.60
  4. Step 4: Simplify right side
    285,227.20x = 32,034,937,049.38
  5. Step 5: Solve for x
    x = 32,034,937,049.38/285,227.20
  6. Step 6: Final answer
    x = 112,313.75

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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.