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Finding the Fourth Proportional to 5,490.70, 7,672.40 and 5,490.70

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Solution

The fourth proportional to 5,490.70, 7,672.40 and 5,490.70 is: 7,672.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,490.70 : 7,672.40 = 5,490.70 : x
  2. Step 2: Convert to fraction form
    5,490.70/7,672.40 = 5,490.70/x
  3. Step 3: Cross multiply
    5,490.70x = 7,672.40 × 5,490.70
  4. Step 4: Simplify right side
    5,490.70x = 42,126,846.68
  5. Step 5: Solve for x
    x = 42,126,846.68/5,490.70
  6. Step 6: Final answer
    x = 7,672.40

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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.