Home / 3,315.42-4,575.71-2,139.91

Finding the Fourth Proportional to 3,315.42, 4,575.71 and 2,139.91

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Solution

The fourth proportional to 3,315.42, 4,575.71 and 2,139.91 is: 2,953.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.42 : 4,575.71 = 2,139.91 : x
  2. Step 2: Convert to fraction form
    3,315.42/4,575.71 = 2,139.91/x
  3. Step 3: Cross multiply
    3,315.42x = 4,575.71 × 2,139.91
  4. Step 4: Simplify right side
    3,315.42x = 9,791,601.50
  5. Step 5: Solve for x
    x = 9,791,601.50/3,315.42
  6. Step 6: Final answer
    x = 2,953.35

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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.