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Finding the Fourth Proportional to 939.95, 1,410.42 and 529.11

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Solution

The fourth proportional to 939.95, 1,410.42 and 529.11 is: 793.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.95 : 1,410.42 = 529.11 : x
  2. Step 2: Convert to fraction form
    939.95/1,410.42 = 529.11/x
  3. Step 3: Cross multiply
    939.95x = 1,410.42 × 529.11
  4. Step 4: Simplify right side
    939.95x = 746,267.33
  5. Step 5: Solve for x
    x = 746,267.33/939.95
  6. Step 6: Final answer
    x = 793.95

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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.