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Finding the Fourth Proportional to 5,488.92, 7,574.16 and 3,721.20

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Solution

The fourth proportional to 5,488.92, 7,574.16 and 3,721.20 is: 5,134.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,488.92 : 7,574.16 = 3,721.20 : x
  2. Step 2: Convert to fraction form
    5,488.92/7,574.16 = 3,721.20/x
  3. Step 3: Cross multiply
    5,488.92x = 7,574.16 × 3,721.20
  4. Step 4: Simplify right side
    5,488.92x = 28,184,964.19
  5. Step 5: Solve for x
    x = 28,184,964.19/5,488.92
  6. Step 6: Final answer
    x = 5,134.88

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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.