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Finding the Fourth Proportional to 5,690.52, 7,852.80 and 3,172.80

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Solution

The fourth proportional to 5,690.52, 7,852.80 and 3,172.80 is: 4,378.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,690.52 : 7,852.80 = 3,172.80 : x
  2. Step 2: Convert to fraction form
    5,690.52/7,852.80 = 3,172.80/x
  3. Step 3: Cross multiply
    5,690.52x = 7,852.80 × 3,172.80
  4. Step 4: Simplify right side
    5,690.52x = 24,915,363.84
  5. Step 5: Solve for x
    x = 24,915,363.84/5,690.52
  6. Step 6: Final answer
    x = 4,378.40

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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.