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Finding the Fourth Proportional to 643,792.94, 888,475.77 and 357,313.03

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Solution

The fourth proportional to 643,792.94, 888,475.77 and 357,313.03 is: 493,115.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,792.94 : 888,475.77 = 357,313.03 : x
  2. Step 2: Convert to fraction form
    643,792.94/888,475.77 = 357,313.03/x
  3. Step 3: Cross multiply
    643,792.94x = 888,475.77 × 357,313.03
  4. Step 4: Simplify right side
    643,792.94x = 317,463,967,239.09
  5. Step 5: Solve for x
    x = 317,463,967,239.09/643,792.94
  6. Step 6: Final answer
    x = 493,115.02

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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.