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Finding the Fourth Proportional to 973.38, 1,342.53 and 679.08

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Solution

The fourth proportional to 973.38, 1,342.53 and 679.08 is: 936.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.38 : 1,342.53 = 679.08 : x
  2. Step 2: Convert to fraction form
    973.38/1,342.53 = 679.08/x
  3. Step 3: Cross multiply
    973.38x = 1,342.53 × 679.08
  4. Step 4: Simplify right side
    973.38x = 911,685.27
  5. Step 5: Solve for x
    x = 911,685.27/973.38
  6. Step 6: Final answer
    x = 936.62

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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.