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Finding the Fourth Proportional to 5,000.80, 7,501.20 and 3,618.40

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Solution

The fourth proportional to 5,000.80, 7,501.20 and 3,618.40 is: 5,427.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,000.80 : 7,501.20 = 3,618.40 : x
  2. Step 2: Convert to fraction form
    5,000.80/7,501.20 = 3,618.40/x
  3. Step 3: Cross multiply
    5,000.80x = 7,501.20 × 3,618.40
  4. Step 4: Simplify right side
    5,000.80x = 27,142,342.08
  5. Step 5: Solve for x
    x = 27,142,342.08/5,000.80
  6. Step 6: Final answer
    x = 5,427.60

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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.