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Finding the Fourth Proportional to 3,130.68, 4,696.56 and 939.54

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Solution

The fourth proportional to 3,130.68, 4,696.56 and 939.54 is: 1,409.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.68 : 4,696.56 = 939.54 : x
  2. Step 2: Convert to fraction form
    3,130.68/4,696.56 = 939.54/x
  3. Step 3: Cross multiply
    3,130.68x = 4,696.56 × 939.54
  4. Step 4: Simplify right side
    3,130.68x = 4,412,605.98
  5. Step 5: Solve for x
    x = 4,412,605.98/3,130.68
  6. Step 6: Final answer
    x = 1,409.47

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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.