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Finding the Fourth Proportional to 312,622.61, 431,390.07 and 176,666.94

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Solution

The fourth proportional to 312,622.61, 431,390.07 and 176,666.94 is: 243,783.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,622.61 : 431,390.07 = 176,666.94 : x
  2. Step 2: Convert to fraction form
    312,622.61/431,390.07 = 176,666.94/x
  3. Step 3: Cross multiply
    312,622.61x = 431,390.07 × 176,666.94
  4. Step 4: Simplify right side
    312,622.61x = 76,212,363,613.29
  5. Step 5: Solve for x
    x = 76,212,363,613.29/312,622.61
  6. Step 6: Final answer
    x = 243,783.92

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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.