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Finding the Fourth Proportional to 312,632.01, 431,426.49 and 176,663.01

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Solution

The fourth proportional to 312,632.01, 431,426.49 and 176,663.01 is: 243,791.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,632.01 : 431,426.49 = 176,663.01 : x
  2. Step 2: Convert to fraction form
    312,632.01/431,426.49 = 176,663.01/x
  3. Step 3: Cross multiply
    312,632.01x = 431,426.49 × 176,663.01
  4. Step 4: Simplify right side
    312,632.01x = 76,217,102,317.13
  5. Step 5: Solve for x
    x = 76,217,102,317.13/312,632.01
  6. Step 6: Final answer
    x = 243,791.74

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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.