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Finding the Fourth Proportional to 280,410.89, 386,952.38 and 153,061.88

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Solution

The fourth proportional to 280,410.89, 386,952.38 and 153,061.88 is: 211,217.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,410.89 : 386,952.38 = 153,061.88 : x
  2. Step 2: Convert to fraction form
    280,410.89/386,952.38 = 153,061.88/x
  3. Step 3: Cross multiply
    280,410.89x = 386,952.38 × 153,061.88
  4. Step 4: Simplify right side
    280,410.89x = 59,227,656,818.51
  5. Step 5: Solve for x
    x = 59,227,656,818.51/280,410.89
  6. Step 6: Final answer
    x = 211,217.40

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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.