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Finding the Fourth Proportional to 280,341.80, 386,865.52 and 153,019.52

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Solution

The fourth proportional to 280,341.80, 386,865.52 and 153,019.52 is: 211,163.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,341.80 : 386,865.52 = 153,019.52 : x
  2. Step 2: Convert to fraction form
    280,341.80/386,865.52 = 153,019.52/x
  3. Step 3: Cross multiply
    280,341.80x = 386,865.52 × 153,019.52
  4. Step 4: Simplify right side
    280,341.80x = 59,197,976,174.95
  5. Step 5: Solve for x
    x = 59,197,976,174.95/280,341.80
  6. Step 6: Final answer
    x = 211,163.57

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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.