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Finding the Fourth Proportional to 5,612.20, 7,868.60 and 5,612.20

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Solution

The fourth proportional to 5,612.20, 7,868.60 and 5,612.20 is: 7,868.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,612.20 : 7,868.60 = 5,612.20 : x
  2. Step 2: Convert to fraction form
    5,612.20/7,868.60 = 5,612.20/x
  3. Step 3: Cross multiply
    5,612.20x = 7,868.60 × 5,612.20
  4. Step 4: Simplify right side
    5,612.20x = 44,160,156.92
  5. Step 5: Solve for x
    x = 44,160,156.92/5,612.20
  6. Step 6: Final answer
    x = 7,868.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.