Home / 3,421.86-4,722.10-1,929.75

Finding the Fourth Proportional to 3,421.86, 4,722.10 and 1,929.75

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Solution

The fourth proportional to 3,421.86, 4,722.10 and 1,929.75 is: 2,663.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.86 : 4,722.10 = 1,929.75 : x
  2. Step 2: Convert to fraction form
    3,421.86/4,722.10 = 1,929.75/x
  3. Step 3: Cross multiply
    3,421.86x = 4,722.10 × 1,929.75
  4. Step 4: Simplify right side
    3,421.86x = 9,112,472.48
  5. Step 5: Solve for x
    x = 9,112,472.48/3,421.86
  6. Step 6: Final answer
    x = 2,663.02

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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.