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Finding the Fourth Proportional to 528,136.11, 728,808.17 and 313,147.53

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Solution

The fourth proportional to 528,136.11, 728,808.17 and 313,147.53 is: 432,131.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,136.11 : 728,808.17 = 313,147.53 : x
  2. Step 2: Convert to fraction form
    528,136.11/728,808.17 = 313,147.53/x
  3. Step 3: Cross multiply
    528,136.11x = 728,808.17 × 313,147.53
  4. Step 4: Simplify right side
    528,136.11x = 228,224,476,713.58
  5. Step 5: Solve for x
    x = 228,224,476,713.58/528,136.11
  6. Step 6: Final answer
    x = 432,131.93

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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.