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Finding the Fourth Proportional to 620,970.69, 857,010.97 and 345,356.52

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Solution

The fourth proportional to 620,970.69, 857,010.97 and 345,356.52 is: 476,631.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,970.69 : 857,010.97 = 345,356.52 : x
  2. Step 2: Convert to fraction form
    620,970.69/857,010.97 = 345,356.52/x
  3. Step 3: Cross multiply
    620,970.69x = 857,010.97 × 345,356.52
  4. Step 4: Simplify right side
    620,970.69x = 295,974,326,201.02
  5. Step 5: Solve for x
    x = 295,974,326,201.02/620,970.69
  6. Step 6: Final answer
    x = 476,631.72

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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.