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Finding the Fourth Proportional to 1,947.03, 2,920.72 and 776.75

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Solution

The fourth proportional to 1,947.03, 2,920.72 and 776.75 is: 1,165.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.03 : 2,920.72 = 776.75 : x
  2. Step 2: Convert to fraction form
    1,947.03/2,920.72 = 776.75/x
  3. Step 3: Cross multiply
    1,947.03x = 2,920.72 × 776.75
  4. Step 4: Simplify right side
    1,947.03x = 2,268,669.26
  5. Step 5: Solve for x
    x = 2,268,669.26/1,947.03
  6. Step 6: Final answer
    x = 1,165.19

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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.