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Finding the Fourth Proportional to 620,972.33, 857,013.21 and 345,358.14

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Solution

The fourth proportional to 620,972.33, 857,013.21 and 345,358.14 is: 476,633.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,972.33 : 857,013.21 = 345,358.14 : x
  2. Step 2: Convert to fraction form
    620,972.33/857,013.21 = 345,358.14/x
  3. Step 3: Cross multiply
    620,972.33x = 857,013.21 × 345,358.14
  4. Step 4: Simplify right side
    620,972.33x = 295,976,488,161.03
  5. Step 5: Solve for x
    x = 295,976,488,161.03/620,972.33
  6. Step 6: Final answer
    x = 476,633.94

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1.5x scale

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.