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Finding the Fourth Proportional to 520,104, 717,743.52 and 281,640

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Solution

The fourth proportional to 520,104, 717,743.52 and 281,640 is: 388,663.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,104 : 717,743.52 = 281,640 : x
  2. Step 2: Convert to fraction form
    520,104/717,743.52 = 281,640/x
  3. Step 3: Cross multiply
    520,104x = 717,743.52 × 281,640
  4. Step 4: Simplify right side
    520,104x = 202,145,284,972.80
  5. Step 5: Solve for x
    x = 202,145,284,972.80/520,104
  6. Step 6: Final answer
    x = 388,663.20

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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.