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Finding the Fourth Proportional to 1,946.08, 2,919.30 and 775.80

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Solution

The fourth proportional to 1,946.08, 2,919.30 and 775.80 is: 1,163.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.08 : 2,919.30 = 775.80 : x
  2. Step 2: Convert to fraction form
    1,946.08/2,919.30 = 775.80/x
  3. Step 3: Cross multiply
    1,946.08x = 2,919.30 × 775.80
  4. Step 4: Simplify right side
    1,946.08x = 2,264,774.46
  5. Step 5: Solve for x
    x = 2,264,774.46/1,946.08
  6. Step 6: Final answer
    x = 1,163.77

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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.