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Finding the Fourth Proportional to 220,685.25, 330,978.63 and 102,341.22

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Solution

The fourth proportional to 220,685.25, 330,978.63 and 102,341.22 is: 153,488.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,685.25 : 330,978.63 = 102,341.22 : x
  2. Step 2: Convert to fraction form
    220,685.25/330,978.63 = 102,341.22/x
  3. Step 3: Cross multiply
    220,685.25x = 330,978.63 × 102,341.22
  4. Step 4: Simplify right side
    220,685.25x = 33,872,756,788.13
  5. Step 5: Solve for x
    x = 33,872,756,788.13/220,685.25
  6. Step 6: Final answer
    x = 153,488.99

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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.