Home / 5,128.02-7,674.60-3,280.40

Finding the Fourth Proportional to 5,128.02, 7,674.60 and 3,280.40

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Solution

The fourth proportional to 5,128.02, 7,674.60 and 3,280.40 is: 4,909.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.02 : 7,674.60 = 3,280.40 : x
  2. Step 2: Convert to fraction form
    5,128.02/7,674.60 = 3,280.40/x
  3. Step 3: Cross multiply
    5,128.02x = 7,674.60 × 3,280.40
  4. Step 4: Simplify right side
    5,128.02x = 25,175,757.84
  5. Step 5: Solve for x
    x = 25,175,757.84/5,128.02
  6. Step 6: Final answer
    x = 4,909.45

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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.