Home / 1,445.58-2,165.76-1,215.90

Finding the Fourth Proportional to 1,445.58, 2,165.76 and 1,215.90

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Solution

The fourth proportional to 1,445.58, 2,165.76 and 1,215.90 is: 1,821.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.58 : 2,165.76 = 1,215.90 : x
  2. Step 2: Convert to fraction form
    1,445.58/2,165.76 = 1,215.90/x
  3. Step 3: Cross multiply
    1,445.58x = 2,165.76 × 1,215.90
  4. Step 4: Simplify right side
    1,445.58x = 2,633,347.58
  5. Step 5: Solve for x
    x = 2,633,347.58/1,445.58
  6. Step 6: Final answer
    x = 1,821.65

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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.