Home / 3,421.78-5,133.90-1,779.10

Finding the Fourth Proportional to 3,421.78, 5,133.90 and 1,779.10

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Solution

The fourth proportional to 3,421.78, 5,133.90 and 1,779.10 is: 2,669.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.78 : 5,133.90 = 1,779.10 : x
  2. Step 2: Convert to fraction form
    3,421.78/5,133.90 = 1,779.10/x
  3. Step 3: Cross multiply
    3,421.78x = 5,133.90 × 1,779.10
  4. Step 4: Simplify right side
    3,421.78x = 9,133,721.49
  5. Step 5: Solve for x
    x = 9,133,721.49/3,421.78
  6. Step 6: Final answer
    x = 2,669.29

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1.5x scale

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.