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Finding the Fourth Proportional to 280,330.80, 386,980.92 and 189,818.16

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Solution

The fourth proportional to 280,330.80, 386,980.92 and 189,818.16 is: 262,033.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,330.80 : 386,980.92 = 189,818.16 : x
  2. Step 2: Convert to fraction form
    280,330.80/386,980.92 = 189,818.16/x
  3. Step 3: Cross multiply
    280,330.80x = 386,980.92 × 189,818.16
  4. Step 4: Simplify right side
    280,330.80x = 73,456,006,189.51
  5. Step 5: Solve for x
    x = 73,456,006,189.51/280,330.80
  6. Step 6: Final answer
    x = 262,033.31

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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.