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Finding the Fourth Proportional to 1,220,834, 1,684,750.92 and 684,290

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Solution

The fourth proportional to 1,220,834, 1,684,750.92 and 684,290 is: 944,320.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220,834 : 1,684,750.92 = 684,290 : x
  2. Step 2: Convert to fraction form
    1,220,834/1,684,750.92 = 684,290/x
  3. Step 3: Cross multiply
    1,220,834x = 1,684,750.92 × 684,290
  4. Step 4: Simplify right side
    1,220,834x = 1,152,858,207,046.80
  5. Step 5: Solve for x
    x = 1,152,858,207,046.80/1,220,834
  6. Step 6: Final answer
    x = 944,320.20

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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.