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Finding the Fourth Proportional to 1,396.71, 1,928.07 and 956.88

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Solution

The fourth proportional to 1,396.71, 1,928.07 and 956.88 is: 1,320.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.71 : 1,928.07 = 956.88 : x
  2. Step 2: Convert to fraction form
    1,396.71/1,928.07 = 956.88/x
  3. Step 3: Cross multiply
    1,396.71x = 1,928.07 × 956.88
  4. Step 4: Simplify right side
    1,396.71x = 1,844,931.62
  5. Step 5: Solve for x
    x = 1,844,931.62/1,396.71
  6. Step 6: Final answer
    x = 1,320.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.