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Finding the Fourth Proportional to 520,189, 717,860.82 and 281,725

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Solution

The fourth proportional to 520,189, 717,860.82 and 281,725 is: 388,780.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,189 : 717,860.82 = 281,725 : x
  2. Step 2: Convert to fraction form
    520,189/717,860.82 = 281,725/x
  3. Step 3: Cross multiply
    520,189x = 717,860.82 × 281,725
  4. Step 4: Simplify right side
    520,189x = 202,239,339,514.50
  5. Step 5: Solve for x
    x = 202,239,339,514.50/520,189
  6. Step 6: Final answer
    x = 388,780.50

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1.5x scale

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.