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Finding the Fourth Proportional to 621,767.75, 858,039.51 and 353,495.75

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Solution

The fourth proportional to 621,767.75, 858,039.51 and 353,495.75 is: 487,824.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,767.75 : 858,039.51 = 353,495.75 : x
  2. Step 2: Convert to fraction form
    621,767.75/858,039.51 = 353,495.75/x
  3. Step 3: Cross multiply
    621,767.75x = 858,039.51 × 353,495.75
  4. Step 4: Simplify right side
    621,767.75x = 303,313,320,117.08
  5. Step 5: Solve for x
    x = 303,313,320,117.08/621,767.75
  6. Step 6: Final answer
    x = 487,824.14

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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.