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Finding the Fourth Proportional to 371,690.40, 512,976.72 and 220,788

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Solution

The fourth proportional to 371,690.40, 512,976.72 and 220,788 is: 304,713.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,690.40 : 512,976.72 = 220,788 : x
  2. Step 2: Convert to fraction form
    371,690.40/512,976.72 = 220,788/x
  3. Step 3: Cross multiply
    371,690.40x = 512,976.72 × 220,788
  4. Step 4: Simplify right side
    371,690.40x = 113,259,104,055.36
  5. Step 5: Solve for x
    x = 113,259,104,055.36/371,690.40
  6. Step 6: Final answer
    x = 304,713.56

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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.