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Finding the Fourth Proportional to 285,290.52, 427,977.50 and 85,626.69

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Solution

The fourth proportional to 285,290.52, 427,977.50 and 85,626.69 is: 128,452.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,290.52 : 427,977.50 = 85,626.69 : x
  2. Step 2: Convert to fraction form
    285,290.52/427,977.50 = 85,626.69/x
  3. Step 3: Cross multiply
    285,290.52x = 427,977.50 × 85,626.69
  4. Step 4: Simplify right side
    285,290.52x = 36,646,296,719.48
  5. Step 5: Solve for x
    x = 36,646,296,719.48/285,290.52
  6. Step 6: Final answer
    x = 128,452.56

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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.