Home / 5,320.42-7,980.54-1,424.80

Finding the Fourth Proportional to 5,320.42, 7,980.54 and 1,424.80

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Solution

The fourth proportional to 5,320.42, 7,980.54 and 1,424.80 is: 2,137.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,320.42 : 7,980.54 = 1,424.80 : x
  2. Step 2: Convert to fraction form
    5,320.42/7,980.54 = 1,424.80/x
  3. Step 3: Cross multiply
    5,320.42x = 7,980.54 × 1,424.80
  4. Step 4: Simplify right side
    5,320.42x = 11,370,673.39
  5. Step 5: Solve for x
    x = 11,370,673.39/5,320.42
  6. Step 6: Final answer
    x = 2,137.18

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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.