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Finding the Fourth Proportional to 1,954.71, 2,931.26 and 656.28

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Solution

The fourth proportional to 1,954.71, 2,931.26 and 656.28 is: 984.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,954.71 : 2,931.26 = 656.28 : x
  2. Step 2: Convert to fraction form
    1,954.71/2,931.26 = 656.28/x
  3. Step 3: Cross multiply
    1,954.71x = 2,931.26 × 656.28
  4. Step 4: Simplify right side
    1,954.71x = 1,923,724.03
  5. Step 5: Solve for x
    x = 1,923,724.03/1,954.71
  6. Step 6: Final answer
    x = 984.15

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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.