Home / 3,390.31-4,678.92-1,898.20

Finding the Fourth Proportional to 3,390.31, 4,678.92 and 1,898.20

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Solution

The fourth proportional to 3,390.31, 4,678.92 and 1,898.20 is: 2,619.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.31 : 4,678.92 = 1,898.20 : x
  2. Step 2: Convert to fraction form
    3,390.31/4,678.92 = 1,898.20/x
  3. Step 3: Cross multiply
    3,390.31x = 4,678.92 × 1,898.20
  4. Step 4: Simplify right side
    3,390.31x = 8,881,525.94
  5. Step 5: Solve for x
    x = 8,881,525.94/3,390.31
  6. Step 6: Final answer
    x = 2,619.68

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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.