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Finding the Fourth Proportional to 5,490.80, 7,577.80 and 3,133.72

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Solution

The fourth proportional to 5,490.80, 7,577.80 and 3,133.72 is: 4,324.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,490.80 : 7,577.80 = 3,133.72 : x
  2. Step 2: Convert to fraction form
    5,490.80/7,577.80 = 3,133.72/x
  3. Step 3: Cross multiply
    5,490.80x = 7,577.80 × 3,133.72
  4. Step 4: Simplify right side
    5,490.80x = 23,746,703.42
  5. Step 5: Solve for x
    x = 23,746,703.42/5,490.80
  6. Step 6: Final answer
    x = 4,324.82

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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.