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Finding the Fourth Proportional to 611,109.20, 916,444.20 and 211,642.40

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Solution

The fourth proportional to 611,109.20, 916,444.20 and 211,642.40 is: 317,387.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,109.20 : 916,444.20 = 211,642.40 : x
  2. Step 2: Convert to fraction form
    611,109.20/916,444.20 = 211,642.40/x
  3. Step 3: Cross multiply
    611,109.20x = 916,444.20 × 211,642.40
  4. Step 4: Simplify right side
    611,109.20x = 193,958,449,954.08
  5. Step 5: Solve for x
    x = 193,958,449,954.08/611,109.20
  6. Step 6: Final answer
    x = 317,387.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.