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Finding the Fourth Proportional to 1,947.27, 2,920.49 and 631.16

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Solution

The fourth proportional to 1,947.27, 2,920.49 and 631.16 is: 946.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.27 : 2,920.49 = 631.16 : x
  2. Step 2: Convert to fraction form
    1,947.27/2,920.49 = 631.16/x
  3. Step 3: Cross multiply
    1,947.27x = 2,920.49 × 631.16
  4. Step 4: Simplify right side
    1,947.27x = 1,843,292.03
  5. Step 5: Solve for x
    x = 1,843,292.03/1,947.27
  6. Step 6: Final answer
    x = 946.60

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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.