Home / 1,780.10-2,672.55-1,415.30

Finding the Fourth Proportional to 1,780.10, 2,672.55 and 1,415.30

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Solution

The fourth proportional to 1,780.10, 2,672.55 and 1,415.30 is: 2,124.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.10 : 2,672.55 = 1,415.30 : x
  2. Step 2: Convert to fraction form
    1,780.10/2,672.55 = 1,415.30/x
  3. Step 3: Cross multiply
    1,780.10x = 2,672.55 × 1,415.30
  4. Step 4: Simplify right side
    1,780.10x = 3,782,460.02
  5. Step 5: Solve for x
    x = 3,782,460.02/1,780.10
  6. Step 6: Final answer
    x = 2,124.86

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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.