Home / 3,612.61-5,417.97-1,421.38

Finding the Fourth Proportional to 3,612.61, 5,417.97 and 1,421.38

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Solution

The fourth proportional to 3,612.61, 5,417.97 and 1,421.38 is: 2,131.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.61 : 5,417.97 = 1,421.38 : x
  2. Step 2: Convert to fraction form
    3,612.61/5,417.97 = 1,421.38/x
  3. Step 3: Cross multiply
    3,612.61x = 5,417.97 × 1,421.38
  4. Step 4: Simplify right side
    3,612.61x = 7,700,994.20
  5. Step 5: Solve for x
    x = 7,700,994.20/3,612.61
  6. Step 6: Final answer
    x = 2,131.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.