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Finding the Fourth Proportional to 280,411.40, 386,953.09 and 153,062.39

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Solution

The fourth proportional to 280,411.40, 386,953.09 and 153,062.39 is: 211,218.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,411.40 : 386,953.09 = 153,062.39 : x
  2. Step 2: Convert to fraction form
    280,411.40/386,953.09 = 153,062.39/x
  3. Step 3: Cross multiply
    280,411.40x = 386,953.09 × 153,062.39
  4. Step 4: Simplify right side
    280,411.40x = 59,227,965,358.01
  5. Step 5: Solve for x
    x = 59,227,965,358.01/280,411.40
  6. Step 6: Final answer
    x = 211,218.11

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.