Home / 3,421.42-4,721.55-1,929.35

Finding the Fourth Proportional to 3,421.42, 4,721.55 and 1,929.35

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Solution

The fourth proportional to 3,421.42, 4,721.55 and 1,929.35 is: 2,662.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.42 : 4,721.55 = 1,929.35 : x
  2. Step 2: Convert to fraction form
    3,421.42/4,721.55 = 1,929.35/x
  3. Step 3: Cross multiply
    3,421.42x = 4,721.55 × 1,929.35
  4. Step 4: Simplify right side
    3,421.42x = 9,109,500.50
  5. Step 5: Solve for x
    x = 9,109,500.50/3,421.42
  6. Step 6: Final answer
    x = 2,662.49

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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.