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Finding the Fourth Proportional to 285,040.27, 427,440.12 and 85,389.04

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Solution

The fourth proportional to 285,040.27, 427,440.12 and 85,389.04 is: 128,047.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,040.27 : 427,440.12 = 85,389.04 : x
  2. Step 2: Convert to fraction form
    285,040.27/427,440.12 = 85,389.04/x
  3. Step 3: Cross multiply
    285,040.27x = 427,440.12 × 85,389.04
  4. Step 4: Simplify right side
    285,040.27x = 36,498,701,504.28
  5. Step 5: Solve for x
    x = 36,498,701,504.28/285,040.27
  6. Step 6: Final answer
    x = 128,047.53

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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.