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Finding the Fourth Proportional to 620,974.19, 857,015.80 and 345,360.02

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Solution

The fourth proportional to 620,974.19, 857,015.80 and 345,360.02 is: 476,636.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,974.19 : 857,015.80 = 345,360.02 : x
  2. Step 2: Convert to fraction form
    620,974.19/857,015.80 = 345,360.02/x
  3. Step 3: Cross multiply
    620,974.19x = 857,015.80 × 345,360.02
  4. Step 4: Simplify right side
    620,974.19x = 295,978,988,679.84
  5. Step 5: Solve for x
    x = 295,978,988,679.84/620,974.19
  6. Step 6: Final answer
    x = 476,636.54

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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.