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Finding the Fourth Proportional to 479,047.72, 661,076.90 and 261,258.98

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Solution

The fourth proportional to 479,047.72, 661,076.90 and 261,258.98 is: 360,532.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,047.72 : 661,076.90 = 261,258.98 : x
  2. Step 2: Convert to fraction form
    479,047.72/661,076.90 = 261,258.98/x
  3. Step 3: Cross multiply
    479,047.72x = 661,076.90 × 261,258.98
  4. Step 4: Simplify right side
    479,047.72x = 172,712,276,595.56
  5. Step 5: Solve for x
    x = 172,712,276,595.56/479,047.72
  6. Step 6: Final answer
    x = 360,532.51

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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.