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Finding the Fourth Proportional to 1,772.19, 2,658.66 and 539.69

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Solution

The fourth proportional to 1,772.19, 2,658.66 and 539.69 is: 809.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.19 : 2,658.66 = 539.69 : x
  2. Step 2: Convert to fraction form
    1,772.19/2,658.66 = 539.69/x
  3. Step 3: Cross multiply
    1,772.19x = 2,658.66 × 539.69
  4. Step 4: Simplify right side
    1,772.19x = 1,434,838.92
  5. Step 5: Solve for x
    x = 1,434,838.92/1,772.19
  6. Step 6: Final answer
    x = 809.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.