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Finding the Fourth Proportional to 1,653.14, 2,479.71 and 679.34

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Solution

The fourth proportional to 1,653.14, 2,479.71 and 679.34 is: 1,019.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.14 : 2,479.71 = 679.34 : x
  2. Step 2: Convert to fraction form
    1,653.14/2,479.71 = 679.34/x
  3. Step 3: Cross multiply
    1,653.14x = 2,479.71 × 679.34
  4. Step 4: Simplify right side
    1,653.14x = 1,684,566.19
  5. Step 5: Solve for x
    x = 1,684,566.19/1,653.14
  6. Step 6: Final answer
    x = 1,019.01

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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.