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Finding the Fourth Proportional to 1,943.75, 2,913.79 and 774.48

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Solution

The fourth proportional to 1,943.75, 2,913.79 and 774.48 is: 1,160.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,943.75 : 2,913.79 = 774.48 : x
  2. Step 2: Convert to fraction form
    1,943.75/2,913.79 = 774.48/x
  3. Step 3: Cross multiply
    1,943.75x = 2,913.79 × 774.48
  4. Step 4: Simplify right side
    1,943.75x = 2,256,657.51
  5. Step 5: Solve for x
    x = 2,256,657.51/1,943.75
  6. Step 6: Final answer
    x = 1,160.98

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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.