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Finding the Fourth Proportional to 2,876.68, 3,970.20 and 1,698.22

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Solution

The fourth proportional to 2,876.68, 3,970.20 and 1,698.22 is: 2,343.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,876.68 : 3,970.20 = 1,698.22 : x
  2. Step 2: Convert to fraction form
    2,876.68/3,970.20 = 1,698.22/x
  3. Step 3: Cross multiply
    2,876.68x = 3,970.20 × 1,698.22
  4. Step 4: Simplify right side
    2,876.68x = 6,742,273.04
  5. Step 5: Solve for x
    x = 6,742,273.04/2,876.68
  6. Step 6: Final answer
    x = 2,343.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.