Home / 2,918.80-4,373.40-2,429.20

Finding the Fourth Proportional to 2,918.80, 4,373.40 and 2,429.20

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Solution

The fourth proportional to 2,918.80, 4,373.40 and 2,429.20 is: 3,639.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.80 : 4,373.40 = 2,429.20 : x
  2. Step 2: Convert to fraction form
    2,918.80/4,373.40 = 2,429.20/x
  3. Step 3: Cross multiply
    2,918.80x = 4,373.40 × 2,429.20
  4. Step 4: Simplify right side
    2,918.80x = 10,623,863.28
  5. Step 5: Solve for x
    x = 10,623,863.28/2,918.80
  6. Step 6: Final answer
    x = 3,639.81

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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.