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Finding the Fourth Proportional to 1,095.84, 1,643.72 and 479.21

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Solution

The fourth proportional to 1,095.84, 1,643.72 and 479.21 is: 718.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.84 : 1,643.72 = 479.21 : x
  2. Step 2: Convert to fraction form
    1,095.84/1,643.72 = 479.21/x
  3. Step 3: Cross multiply
    1,095.84x = 1,643.72 × 479.21
  4. Step 4: Simplify right side
    1,095.84x = 787,676.45
  5. Step 5: Solve for x
    x = 787,676.45/1,095.84
  6. Step 6: Final answer
    x = 718.79

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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.