Home / 4,428.48-6,638.64-2,780

Finding the Fourth Proportional to 4,428.48, 6,638.64 and 2,780

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Solution

The fourth proportional to 4,428.48, 6,638.64 and 2,780 is: 4,167.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,428.48 : 6,638.64 = 2,780 : x
  2. Step 2: Convert to fraction form
    4,428.48/6,638.64 = 2,780/x
  3. Step 3: Cross multiply
    4,428.48x = 6,638.64 × 2,780
  4. Step 4: Simplify right side
    4,428.48x = 18,455,419.20
  5. Step 5: Solve for x
    x = 18,455,419.20/4,428.48
  6. Step 6: Final answer
    x = 4,167.44

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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.