Home / 2,877.80-3,970.34-1,698.28

Finding the Fourth Proportional to 2,877.80, 3,970.34 and 1,698.28

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Solution

The fourth proportional to 2,877.80, 3,970.34 and 1,698.28 is: 2,343.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,877.80 : 3,970.34 = 1,698.28 : x
  2. Step 2: Convert to fraction form
    2,877.80/3,970.34 = 1,698.28/x
  3. Step 3: Cross multiply
    2,877.80x = 3,970.34 × 1,698.28
  4. Step 4: Simplify right side
    2,877.80x = 6,742,749.02
  5. Step 5: Solve for x
    x = 6,742,749.02/2,877.80
  6. Step 6: Final answer
    x = 2,343.02

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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.