Home / 3,390.65-4,672.75-2,643.42

Finding the Fourth Proportional to 3,390.65, 4,672.75 and 2,643.42

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Solution

The fourth proportional to 3,390.65, 4,672.75 and 2,643.42 is: 3,642.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.65 : 4,672.75 = 2,643.42 : x
  2. Step 2: Convert to fraction form
    3,390.65/4,672.75 = 2,643.42/x
  3. Step 3: Cross multiply
    3,390.65x = 4,672.75 × 2,643.42
  4. Step 4: Simplify right side
    3,390.65x = 12,352,040.81
  5. Step 5: Solve for x
    x = 12,352,040.81/3,390.65
  6. Step 6: Final answer
    x = 3,642.97

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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.