Home / 1,946.45-2,919.69-485.55

Finding the Fourth Proportional to 1,946.45, 2,919.69 and 485.55

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Solution

The fourth proportional to 1,946.45, 2,919.69 and 485.55 is: 728.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.45 : 2,919.69 = 485.55 : x
  2. Step 2: Convert to fraction form
    1,946.45/2,919.69 = 485.55/x
  3. Step 3: Cross multiply
    1,946.45x = 2,919.69 × 485.55
  4. Step 4: Simplify right side
    1,946.45x = 1,417,655.48
  5. Step 5: Solve for x
    x = 1,417,655.48/1,946.45
  6. Step 6: Final answer
    x = 728.33

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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.