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Finding the Fourth Proportional to 6,290.40, 9,435.60 and 5,728.80

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Solution

The fourth proportional to 6,290.40, 9,435.60 and 5,728.80 is: 8,593.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,290.40 : 9,435.60 = 5,728.80 : x
  2. Step 2: Convert to fraction form
    6,290.40/9,435.60 = 5,728.80/x
  3. Step 3: Cross multiply
    6,290.40x = 9,435.60 × 5,728.80
  4. Step 4: Simplify right side
    6,290.40x = 54,054,665.28
  5. Step 5: Solve for x
    x = 54,054,665.28/6,290.40
  6. Step 6: Final answer
    x = 8,593.20

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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.