Home / 3,420.16-5,128.98-1,228.30

Finding the Fourth Proportional to 3,420.16, 5,128.98 and 1,228.30

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Solution

The fourth proportional to 3,420.16, 5,128.98 and 1,228.30 is: 1,842.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.16 : 5,128.98 = 1,228.30 : x
  2. Step 2: Convert to fraction form
    3,420.16/5,128.98 = 1,228.30/x
  3. Step 3: Cross multiply
    3,420.16x = 5,128.98 × 1,228.30
  4. Step 4: Simplify right side
    3,420.16x = 6,299,926.13
  5. Step 5: Solve for x
    x = 6,299,926.13/3,420.16
  6. Step 6: Final answer
    x = 1,842.00

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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.