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Finding the Fourth Proportional to 557,661.12, 769,571.04 and 315,943.20

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Solution

The fourth proportional to 557,661.12, 769,571.04 and 315,943.20 is: 436,000.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,661.12 : 769,571.04 = 315,943.20 : x
  2. Step 2: Convert to fraction form
    557,661.12/769,571.04 = 315,943.20/x
  3. Step 3: Cross multiply
    557,661.12x = 769,571.04 × 315,943.20
  4. Step 4: Simplify right side
    557,661.12x = 243,140,737,004.93
  5. Step 5: Solve for x
    x = 243,140,737,004.93/557,661.12
  6. Step 6: Final answer
    x = 436,000.88

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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.