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Finding the Fourth Proportional to 312,020.30, 430,588.10 and 176,083.07

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Solution

The fourth proportional to 312,020.30, 430,588.10 and 176,083.07 is: 242,994.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,020.30 : 430,588.10 = 176,083.07 : x
  2. Step 2: Convert to fraction form
    312,020.30/430,588.10 = 176,083.07/x
  3. Step 3: Cross multiply
    312,020.30x = 430,588.10 × 176,083.07
  4. Step 4: Simplify right side
    312,020.30x = 75,819,272,840.73
  5. Step 5: Solve for x
    x = 75,819,272,840.73/312,020.30
  6. Step 6: Final answer
    x = 242,994.68

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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.