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Finding the Fourth Proportional to 300,875.78, 415,154.13 and 193,421.18

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Solution

The fourth proportional to 300,875.78, 415,154.13 and 193,421.18 is: 266,886.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,875.78 : 415,154.13 = 193,421.18 : x
  2. Step 2: Convert to fraction form
    300,875.78/415,154.13 = 193,421.18/x
  3. Step 3: Cross multiply
    300,875.78x = 415,154.13 × 193,421.18
  4. Step 4: Simplify right side
    300,875.78x = 80,299,601,706.47
  5. Step 5: Solve for x
    x = 80,299,601,706.47/300,875.78
  6. Step 6: Final answer
    x = 266,886.23

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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.