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Finding the Fourth Proportional to 280,369.77, 386,910.12 and 153,045.33

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Solution

The fourth proportional to 280,369.77, 386,910.12 and 153,045.33 is: 211,202.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,369.77 : 386,910.12 = 153,045.33 : x
  2. Step 2: Convert to fraction form
    280,369.77/386,910.12 = 153,045.33/x
  3. Step 3: Cross multiply
    280,369.77x = 386,910.12 × 153,045.33
  4. Step 4: Simplify right side
    280,369.77x = 59,214,786,995.74
  5. Step 5: Solve for x
    x = 59,214,786,995.74/280,369.77
  6. Step 6: Final answer
    x = 211,202.47

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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.