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Finding the Fourth Proportional to 1,479.34, 2,218.72 and 554.65

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Solution

The fourth proportional to 1,479.34, 2,218.72 and 554.65 is: 831.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.34 : 2,218.72 = 554.65 : x
  2. Step 2: Convert to fraction form
    1,479.34/2,218.72 = 554.65/x
  3. Step 3: Cross multiply
    1,479.34x = 2,218.72 × 554.65
  4. Step 4: Simplify right side
    1,479.34x = 1,230,613.05
  5. Step 5: Solve for x
    x = 1,230,613.05/1,479.34
  6. Step 6: Final answer
    x = 831.87

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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.