Home / 1,478.86-2,215.68-1,317.97

Finding the Fourth Proportional to 1,478.86, 2,215.68 and 1,317.97

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Solution

The fourth proportional to 1,478.86, 2,215.68 and 1,317.97 is: 1,974.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.86 : 2,215.68 = 1,317.97 : x
  2. Step 2: Convert to fraction form
    1,478.86/2,215.68 = 1,317.97/x
  3. Step 3: Cross multiply
    1,478.86x = 2,215.68 × 1,317.97
  4. Step 4: Simplify right side
    1,478.86x = 2,920,199.77
  5. Step 5: Solve for x
    x = 2,920,199.77/1,478.86
  6. Step 6: Final answer
    x = 1,974.63

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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.