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Finding the Fourth Proportional to 4,881.80, 7,322.70 and 4,347.20

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Solution

The fourth proportional to 4,881.80, 7,322.70 and 4,347.20 is: 6,520.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,881.80 : 7,322.70 = 4,347.20 : x
  2. Step 2: Convert to fraction form
    4,881.80/7,322.70 = 4,347.20/x
  3. Step 3: Cross multiply
    4,881.80x = 7,322.70 × 4,347.20
  4. Step 4: Simplify right side
    4,881.80x = 31,833,241.44
  5. Step 5: Solve for x
    x = 31,833,241.44/4,881.80
  6. Step 6: Final answer
    x = 6,520.80

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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.