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Finding the Fourth Proportional to 2,931.28, 4,395.36 and 982.84

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Solution

The fourth proportional to 2,931.28, 4,395.36 and 982.84 is: 1,473.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.28 : 4,395.36 = 982.84 : x
  2. Step 2: Convert to fraction form
    2,931.28/4,395.36 = 982.84/x
  3. Step 3: Cross multiply
    2,931.28x = 4,395.36 × 982.84
  4. Step 4: Simplify right side
    2,931.28x = 4,319,935.62
  5. Step 5: Solve for x
    x = 4,319,935.62/2,931.28
  6. Step 6: Final answer
    x = 1,473.74

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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.