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Finding the Fourth Proportional to 557,805.39, 769,767.20 and 303,158.40

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Solution

The fourth proportional to 557,805.39, 769,767.20 and 303,158.40 is: 418,356.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,805.39 : 769,767.20 = 303,158.40 : x
  2. Step 2: Convert to fraction form
    557,805.39/769,767.20 = 303,158.40/x
  3. Step 3: Cross multiply
    557,805.39x = 769,767.20 × 303,158.40
  4. Step 4: Simplify right side
    557,805.39x = 233,361,391,208.69
  5. Step 5: Solve for x
    x = 233,361,391,208.69/557,805.39
  6. Step 6: Final answer
    x = 418,356.29

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1.5x scale

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.