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Finding the Fourth Proportional to 714,188.97, 985,578.08 and 391,904.46

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Solution

The fourth proportional to 714,188.97, 985,578.08 and 391,904.46 is: 540,826.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,188.97 : 985,578.08 = 391,904.46 : x
  2. Step 2: Convert to fraction form
    714,188.97/985,578.08 = 391,904.46/x
  3. Step 3: Cross multiply
    714,188.97x = 985,578.08 × 391,904.46
  4. Step 4: Simplify right side
    714,188.97x = 386,252,443,270.72
  5. Step 5: Solve for x
    x = 386,252,443,270.72/714,188.97
  6. Step 6: Final answer
    x = 540,826.67

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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.