Home / 1,946.46-2,919.62-485.63

Finding the Fourth Proportional to 1,946.46, 2,919.62 and 485.63

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Solution

The fourth proportional to 1,946.46, 2,919.62 and 485.63 is: 728.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.46 : 2,919.62 = 485.63 : x
  2. Step 2: Convert to fraction form
    1,946.46/2,919.62 = 485.63/x
  3. Step 3: Cross multiply
    1,946.46x = 2,919.62 × 485.63
  4. Step 4: Simplify right side
    1,946.46x = 1,417,838.03
  5. Step 5: Solve for x
    x = 1,417,838.03/1,946.46
  6. Step 6: Final answer
    x = 728.42

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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.