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Finding the Fourth Proportional to 1,937.81, 2,906.90 and 621.23

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Solution

The fourth proportional to 1,937.81, 2,906.90 and 621.23 is: 931.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,937.81 : 2,906.90 = 621.23 : x
  2. Step 2: Convert to fraction form
    1,937.81/2,906.90 = 621.23/x
  3. Step 3: Cross multiply
    1,937.81x = 2,906.90 × 621.23
  4. Step 4: Simplify right side
    1,937.81x = 1,805,858.02
  5. Step 5: Solve for x
    x = 1,805,858.02/1,937.81
  6. Step 6: Final answer
    x = 931.91

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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.