Home / 1,217,512.40-1,680,105.83-666,216.18

Finding the Fourth Proportional to 1,217,512.40, 1,680,105.83 and 666,216.18

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Solution

The fourth proportional to 1,217,512.40, 1,680,105.83 and 666,216.18 is: 919,344.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,512.40 : 1,680,105.83 = 666,216.18 : x
  2. Step 2: Convert to fraction form
    1,217,512.40/1,680,105.83 = 666,216.18/x
  3. Step 3: Cross multiply
    1,217,512.40x = 1,680,105.83 × 666,216.18
  4. Step 4: Simplify right side
    1,217,512.40x = 1,119,313,684,727.25
  5. Step 5: Solve for x
    x = 1,119,313,684,727.25/1,217,512.40
  6. Step 6: Final answer
    x = 919,344.80

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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.