Home / 2,920.96-4,031.58-1,926.40

Finding the Fourth Proportional to 2,920.96, 4,031.58 and 1,926.40

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Solution

The fourth proportional to 2,920.96, 4,031.58 and 1,926.40 is: 2,658.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.96 : 4,031.58 = 1,926.40 : x
  2. Step 2: Convert to fraction form
    2,920.96/4,031.58 = 1,926.40/x
  3. Step 3: Cross multiply
    2,920.96x = 4,031.58 × 1,926.40
  4. Step 4: Simplify right side
    2,920.96x = 7,766,435.71
  5. Step 5: Solve for x
    x = 7,766,435.71/2,920.96
  6. Step 6: Final answer
    x = 2,658.86

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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.