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Finding the Fourth Proportional to 656,136.36, 905,468.22 and 354,330.36

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Solution

The fourth proportional to 656,136.36, 905,468.22 and 354,330.36 is: 488,975.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,136.36 : 905,468.22 = 354,330.36 : x
  2. Step 2: Convert to fraction form
    656,136.36/905,468.22 = 354,330.36/x
  3. Step 3: Cross multiply
    656,136.36x = 905,468.22 × 354,330.36
  4. Step 4: Simplify right side
    656,136.36x = 320,834,880,361.16
  5. Step 5: Solve for x
    x = 320,834,880,361.16/656,136.36
  6. Step 6: Final answer
    x = 488,975.92

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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.