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Finding the Fourth Proportional to 621,870.31, 858,114.86 and 349,933.47

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Solution

The fourth proportional to 621,870.31, 858,114.86 and 349,933.47 is: 482,870.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,870.31 : 858,114.86 = 349,933.47 : x
  2. Step 2: Convert to fraction form
    621,870.31/858,114.86 = 349,933.47/x
  3. Step 3: Cross multiply
    621,870.31x = 858,114.86 × 349,933.47
  4. Step 4: Simplify right side
    621,870.31x = 300,283,107,619.14
  5. Step 5: Solve for x
    x = 300,283,107,619.14/621,870.31
  6. Step 6: Final answer
    x = 482,870.95

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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.