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Finding the Fourth Proportional to 612,105.70, 844,707.61 and 340,172.76

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Solution

The fourth proportional to 612,105.70, 844,707.61 and 340,172.76 is: 469,439.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,105.70 : 844,707.61 = 340,172.76 : x
  2. Step 2: Convert to fraction form
    612,105.70/844,707.61 = 340,172.76/x
  3. Step 3: Cross multiply
    612,105.70x = 844,707.61 × 340,172.76
  4. Step 4: Simplify right side
    612,105.70x = 287,346,517,385.84
  5. Step 5: Solve for x
    x = 287,346,517,385.84/612,105.70
  6. Step 6: Final answer
    x = 469,439.38

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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.