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Finding the Fourth Proportional to 620,932.96, 856,877.28 and 345,279.84

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Solution

The fourth proportional to 620,932.96, 856,877.28 and 345,279.84 is: 476,480.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,932.96 : 856,877.28 = 345,279.84 : x
  2. Step 2: Convert to fraction form
    620,932.96/856,877.28 = 345,279.84/x
  3. Step 3: Cross multiply
    620,932.96x = 856,877.28 × 345,279.84
  4. Step 4: Simplify right side
    620,932.96x = 295,862,450,138.04
  5. Step 5: Solve for x
    x = 295,862,450,138.04/620,932.96
  6. Step 6: Final answer
    x = 476,480.50

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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.