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Finding the Fourth Proportional to 557,978.40, 770,001.12 and 303,336

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Solution

The fourth proportional to 557,978.40, 770,001.12 and 303,336 is: 418,598.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,978.40 : 770,001.12 = 303,336 : x
  2. Step 2: Convert to fraction form
    557,978.40/770,001.12 = 303,336/x
  3. Step 3: Cross multiply
    557,978.40x = 770,001.12 × 303,336
  4. Step 4: Simplify right side
    557,978.40x = 233,569,059,736.32
  5. Step 5: Solve for x
    x = 233,569,059,736.32/557,978.40
  6. Step 6: Final answer
    x = 418,598.75

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.