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Finding the Fourth Proportional to 388,294.81, 536,012.16 and 261,044.21

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Solution

The fourth proportional to 388,294.81, 536,012.16 and 261,044.21 is: 360,352.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,294.81 : 536,012.16 = 261,044.21 : x
  2. Step 2: Convert to fraction form
    388,294.81/536,012.16 = 261,044.21/x
  3. Step 3: Cross multiply
    388,294.81x = 536,012.16 × 261,044.21
  4. Step 4: Simplify right side
    388,294.81x = 139,922,870,857.59
  5. Step 5: Solve for x
    x = 139,922,870,857.59/388,294.81
  6. Step 6: Final answer
    x = 360,352.16

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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.