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Finding the Fourth Proportional to 371,687.40, 512,972.58 and 220,785

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Solution

The fourth proportional to 371,687.40, 512,972.58 and 220,785 is: 304,709.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,687.40 : 512,972.58 = 220,785 : x
  2. Step 2: Convert to fraction form
    371,687.40/512,972.58 = 220,785/x
  3. Step 3: Cross multiply
    371,687.40x = 512,972.58 × 220,785
  4. Step 4: Simplify right side
    371,687.40x = 113,256,651,075.30
  5. Step 5: Solve for x
    x = 113,256,651,075.30/371,687.40
  6. Step 6: Final answer
    x = 304,709.42

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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.