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Finding the Fourth Proportional to 3,420.41, 5,129.96 and 954.77

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Solution

The fourth proportional to 3,420.41, 5,129.96 and 954.77 is: 1,431.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.41 : 5,129.96 = 954.77 : x
  2. Step 2: Convert to fraction form
    3,420.41/5,129.96 = 954.77/x
  3. Step 3: Cross multiply
    3,420.41x = 5,129.96 × 954.77
  4. Step 4: Simplify right side
    3,420.41x = 4,897,901.49
  5. Step 5: Solve for x
    x = 4,897,901.49/3,420.41
  6. Step 6: Final answer
    x = 1,431.97

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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.