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Finding the Fourth Proportional to 260,305.80, 390,458.70 and 73,317.30

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Solution

The fourth proportional to 260,305.80, 390,458.70 and 73,317.30 is: 109,975.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,305.80 : 390,458.70 = 73,317.30 : x
  2. Step 2: Convert to fraction form
    260,305.80/390,458.70 = 73,317.30/x
  3. Step 3: Cross multiply
    260,305.80x = 390,458.70 × 73,317.30
  4. Step 4: Simplify right side
    260,305.80x = 28,627,377,645.51
  5. Step 5: Solve for x
    x = 28,627,377,645.51/260,305.80
  6. Step 6: Final answer
    x = 109,975.95

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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.