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Finding the Fourth Proportional to 5,240.40, 7,844.40 and 4,657.20

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Solution

The fourth proportional to 5,240.40, 7,844.40 and 4,657.20 is: 6,971.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,240.40 : 7,844.40 = 4,657.20 : x
  2. Step 2: Convert to fraction form
    5,240.40/7,844.40 = 4,657.20/x
  3. Step 3: Cross multiply
    5,240.40x = 7,844.40 × 4,657.20
  4. Step 4: Simplify right side
    5,240.40x = 36,532,939.68
  5. Step 5: Solve for x
    x = 36,532,939.68/5,240.40
  6. Step 6: Final answer
    x = 6,971.40

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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.