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Finding the Fourth Proportional to 285,025.77, 427,418.37 and 85,374.54

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Solution

The fourth proportional to 285,025.77, 427,418.37 and 85,374.54 is: 128,025.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,025.77 : 427,418.37 = 85,374.54 : x
  2. Step 2: Convert to fraction form
    285,025.77/427,418.37 = 85,374.54/x
  3. Step 3: Cross multiply
    285,025.77x = 427,418.37 × 85,374.54
  4. Step 4: Simplify right side
    285,025.77x = 36,490,646,726.30
  5. Step 5: Solve for x
    x = 36,490,646,726.30/285,025.77
  6. Step 6: Final answer
    x = 128,025.78

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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.