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Finding the Fourth Proportional to 714,213.22, 985,611.54 and 391,928.71

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Solution

The fourth proportional to 714,213.22, 985,611.54 and 391,928.71 is: 540,860.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,213.22 : 985,611.54 = 391,928.71 : x
  2. Step 2: Convert to fraction form
    714,213.22/985,611.54 = 391,928.71/x
  3. Step 3: Cross multiply
    714,213.22x = 985,611.54 × 391,928.71
  4. Step 4: Simplify right side
    714,213.22x = 386,289,459,433.31
  5. Step 5: Solve for x
    x = 386,289,459,433.31/714,213.22
  6. Step 6: Final answer
    x = 540,860.14

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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.