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Finding the Fourth Proportional to 312,577.76, 431,214.36 and 185,180.96

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Solution

The fourth proportional to 312,577.76, 431,214.36 and 185,180.96 is: 255,465.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,577.76 : 431,214.36 = 185,180.96 : x
  2. Step 2: Convert to fraction form
    312,577.76/431,214.36 = 185,180.96/x
  3. Step 3: Cross multiply
    312,577.76x = 431,214.36 × 185,180.96
  4. Step 4: Simplify right side
    312,577.76x = 79,852,689,150.59
  5. Step 5: Solve for x
    x = 79,852,689,150.59/312,577.76
  6. Step 6: Final answer
    x = 255,465.04

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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.