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Finding the Fourth Proportional to 280,108.55, 386,549.79 and 152,784.14

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Solution

The fourth proportional to 280,108.55, 386,549.79 and 152,784.14 is: 210,842.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,108.55 : 386,549.79 = 152,784.14 : x
  2. Step 2: Convert to fraction form
    280,108.55/386,549.79 = 152,784.14/x
  3. Step 3: Cross multiply
    280,108.55x = 386,549.79 × 152,784.14
  4. Step 4: Simplify right side
    280,108.55x = 59,058,675,299.58
  5. Step 5: Solve for x
    x = 59,058,675,299.58/280,108.55
  6. Step 6: Final answer
    x = 210,842.11

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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.