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Finding the Fourth Proportional to 287,207.75, 430,612.12 and 127,196.49

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Solution

The fourth proportional to 287,207.75, 430,612.12 and 127,196.49 is: 190,706.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,207.75 : 430,612.12 = 127,196.49 : x
  2. Step 2: Convert to fraction form
    287,207.75/430,612.12 = 127,196.49/x
  3. Step 3: Cross multiply
    287,207.75x = 430,612.12 × 127,196.49
  4. Step 4: Simplify right side
    287,207.75x = 54,772,347,426.42
  5. Step 5: Solve for x
    x = 54,772,347,426.42/287,207.75
  6. Step 6: Final answer
    x = 190,706.37

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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.