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Finding the Fourth Proportional to 261,136.98, 391,097.95 and 253,953.63

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Solution

The fourth proportional to 261,136.98, 391,097.95 and 253,953.63 is: 380,339.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,136.98 : 391,097.95 = 253,953.63 : x
  2. Step 2: Convert to fraction form
    261,136.98/391,097.95 = 253,953.63/x
  3. Step 3: Cross multiply
    261,136.98x = 391,097.95 × 253,953.63
  4. Step 4: Simplify right side
    261,136.98x = 99,320,743,453.17
  5. Step 5: Solve for x
    x = 99,320,743,453.17/261,136.98
  6. Step 6: Final answer
    x = 380,339.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.