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Finding the Fourth Proportional to 561,002.72, 774,250.21 and 315,995.54

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Solution

The fourth proportional to 561,002.72, 774,250.21 and 315,995.54 is: 436,111.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,002.72 : 774,250.21 = 315,995.54 : x
  2. Step 2: Convert to fraction form
    561,002.72/774,250.21 = 315,995.54/x
  3. Step 3: Cross multiply
    561,002.72x = 774,250.21 × 315,995.54
  4. Step 4: Simplify right side
    561,002.72x = 244,659,613,204.06
  5. Step 5: Solve for x
    x = 244,659,613,204.06/561,002.72
  6. Step 6: Final answer
    x = 436,111.28

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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.