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Finding the Fourth Proportional to 353,343.72, 487,648.74 and 263,764.20

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Solution

The fourth proportional to 353,343.72, 487,648.74 and 263,764.20 is: 364,020.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,343.72 : 487,648.74 = 263,764.20 : x
  2. Step 2: Convert to fraction form
    353,343.72/487,648.74 = 263,764.20/x
  3. Step 3: Cross multiply
    353,343.72x = 487,648.74 × 263,764.20
  4. Step 4: Simplify right side
    353,343.72x = 128,624,279,787.11
  5. Step 5: Solve for x
    x = 128,624,279,787.11/353,343.72
  6. Step 6: Final answer
    x = 364,020.28

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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.