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Finding the Fourth Proportional to 5,458.80, 7,534.80 and 3,220.50

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Solution

The fourth proportional to 5,458.80, 7,534.80 and 3,220.50 is: 4,445.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,458.80 : 7,534.80 = 3,220.50 : x
  2. Step 2: Convert to fraction form
    5,458.80/7,534.80 = 3,220.50/x
  3. Step 3: Cross multiply
    5,458.80x = 7,534.80 × 3,220.50
  4. Step 4: Simplify right side
    5,458.80x = 24,265,823.40
  5. Step 5: Solve for x
    x = 24,265,823.40/5,458.80
  6. Step 6: Final answer
    x = 4,445.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.