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Finding the Fourth Proportional to 621,687.81, 857,930.49 and 367,055.40

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Solution

The fourth proportional to 621,687.81, 857,930.49 and 367,055.40 is: 506,537.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,687.81 : 857,930.49 = 367,055.40 : x
  2. Step 2: Convert to fraction form
    621,687.81/857,930.49 = 367,055.40/x
  3. Step 3: Cross multiply
    621,687.81x = 857,930.49 × 367,055.40
  4. Step 4: Simplify right side
    621,687.81x = 314,908,019,179.15
  5. Step 5: Solve for x
    x = 314,908,019,179.15/621,687.81
  6. Step 6: Final answer
    x = 506,537.23

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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.