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Finding the Fourth Proportional to 280,937.54, 387,695.09 and 153,613.04

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Solution

The fourth proportional to 280,937.54, 387,695.09 and 153,613.04 is: 211,986.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,937.54 : 387,695.09 = 153,613.04 : x
  2. Step 2: Convert to fraction form
    280,937.54/387,695.09 = 153,613.04/x
  3. Step 3: Cross multiply
    280,937.54x = 387,695.09 × 153,613.04
  4. Step 4: Simplify right side
    280,937.54x = 59,555,019,813.53
  5. Step 5: Solve for x
    x = 59,555,019,813.53/280,937.54
  6. Step 6: Final answer
    x = 211,986.69

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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.