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Finding the Fourth Proportional to 612,605.80, 845,331.30 and 340,629.82

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Solution

The fourth proportional to 612,605.80, 845,331.30 and 340,629.82 is: 470,033.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,605.80 : 845,331.30 = 340,629.82 : x
  2. Step 2: Convert to fraction form
    612,605.80/845,331.30 = 340,629.82/x
  3. Step 3: Cross multiply
    612,605.80x = 845,331.30 × 340,629.82
  4. Step 4: Simplify right side
    612,605.80x = 287,945,048,559.37
  5. Step 5: Solve for x
    x = 287,945,048,559.37/612,605.80
  6. Step 6: Final answer
    x = 470,033.17

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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.