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Finding the Fourth Proportional to 557,830.18, 769,805.74 and 303,181.38

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Solution

The fourth proportional to 557,830.18, 769,805.74 and 303,181.38 is: 418,390.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,830.18 : 769,805.74 = 303,181.38 : x
  2. Step 2: Convert to fraction form
    557,830.18/769,805.74 = 303,181.38/x
  3. Step 3: Cross multiply
    557,830.18x = 769,805.74 × 303,181.38
  4. Step 4: Simplify right side
    557,830.18x = 233,390,766,585.12
  5. Step 5: Solve for x
    x = 233,390,766,585.12/557,830.18
  6. Step 6: Final answer
    x = 418,390.35

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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.