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Finding the Fourth Proportional to 280,186.80, 386,637.72 and 152,859.60

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Solution

The fourth proportional to 280,186.80, 386,637.72 and 152,859.60 is: 210,935.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,186.80 : 386,637.72 = 152,859.60 : x
  2. Step 2: Convert to fraction form
    280,186.80/386,637.72 = 152,859.60/x
  3. Step 3: Cross multiply
    280,186.80x = 386,637.72 × 152,859.60
  4. Step 4: Simplify right side
    280,186.80x = 59,101,287,224.11
  5. Step 5: Solve for x
    x = 59,101,287,224.11/280,186.80
  6. Step 6: Final answer
    x = 210,935.30

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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.