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Finding the Fourth Proportional to 714,219.77, 985,643.70 and 391,951.15

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Solution

The fourth proportional to 714,219.77, 985,643.70 and 391,951.15 is: 540,903.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,219.77 : 985,643.70 = 391,951.15 : x
  2. Step 2: Convert to fraction form
    714,219.77/985,643.70 = 391,951.15/x
  3. Step 3: Cross multiply
    714,219.77x = 985,643.70 × 391,951.15
  4. Step 4: Simplify right side
    714,219.77x = 386,324,181,705.26
  5. Step 5: Solve for x
    x = 386,324,181,705.26/714,219.77
  6. Step 6: Final answer
    x = 540,903.79

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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.