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Finding the Fourth Proportional to 279,964.58, 386,355.30 and 152,642.30

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Solution

The fourth proportional to 279,964.58, 386,355.30 and 152,642.30 is: 210,648.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,964.58 : 386,355.30 = 152,642.30 : x
  2. Step 2: Convert to fraction form
    279,964.58/386,355.30 = 152,642.30/x
  3. Step 3: Cross multiply
    279,964.58x = 386,355.30 × 152,642.30
  4. Step 4: Simplify right side
    279,964.58x = 58,974,161,609.19
  5. Step 5: Solve for x
    x = 58,974,161,609.19/279,964.58
  6. Step 6: Final answer
    x = 210,648.65

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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.