Home / 4,381.20-6,569.40-1,781.20

Finding the Fourth Proportional to 4,381.20, 6,569.40 and 1,781.20

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Solution

The fourth proportional to 4,381.20, 6,569.40 and 1,781.20 is: 2,670.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,381.20 : 6,569.40 = 1,781.20 : x
  2. Step 2: Convert to fraction form
    4,381.20/6,569.40 = 1,781.20/x
  3. Step 3: Cross multiply
    4,381.20x = 6,569.40 × 1,781.20
  4. Step 4: Simplify right side
    4,381.20x = 11,701,415.28
  5. Step 5: Solve for x
    x = 11,701,415.28/4,381.20
  6. Step 6: Final answer
    x = 2,670.82

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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.