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Finding the Fourth Proportional to 388,936.70, 583,405.05 and 355,694.30

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Solution

The fourth proportional to 388,936.70, 583,405.05 and 355,694.30 is: 533,541.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,936.70 : 583,405.05 = 355,694.30 : x
  2. Step 2: Convert to fraction form
    388,936.70/583,405.05 = 355,694.30/x
  3. Step 3: Cross multiply
    388,936.70x = 583,405.05 × 355,694.30
  4. Step 4: Simplify right side
    388,936.70x = 207,513,850,876.22
  5. Step 5: Solve for x
    x = 207,513,850,876.22/388,936.70
  6. Step 6: Final answer
    x = 533,541.45

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Similar ratio
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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.