Home / 3,619.98-5,430.76-1,398.78

Finding the Fourth Proportional to 3,619.98, 5,430.76 and 1,398.78

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Solution

The fourth proportional to 3,619.98, 5,430.76 and 1,398.78 is: 2,098.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.98 : 5,430.76 = 1,398.78 : x
  2. Step 2: Convert to fraction form
    3,619.98/5,430.76 = 1,398.78/x
  3. Step 3: Cross multiply
    3,619.98x = 5,430.76 × 1,398.78
  4. Step 4: Simplify right side
    3,619.98x = 7,596,438.47
  5. Step 5: Solve for x
    x = 7,596,438.47/3,619.98
  6. Step 6: Final answer
    x = 2,098.48

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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.