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Finding the Fourth Proportional to 714,844.85, 986,485.87 and 392,560.32

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Solution

The fourth proportional to 714,844.85, 986,485.87 and 392,560.32 is: 541,733.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,844.85 : 986,485.87 = 392,560.32 : x
  2. Step 2: Convert to fraction form
    714,844.85/986,485.87 = 392,560.32/x
  3. Step 3: Cross multiply
    714,844.85x = 986,485.87 × 392,560.32
  4. Step 4: Simplify right side
    714,844.85x = 387,255,212,992.70
  5. Step 5: Solve for x
    x = 387,255,212,992.70/714,844.85
  6. Step 6: Final answer
    x = 541,733.24

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Double scale
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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.