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Finding the Fourth Proportional to 612,705.20, 845,525.28 and 340,772

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Solution

The fourth proportional to 612,705.20, 845,525.28 and 340,772 is: 470,260.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,705.20 : 845,525.28 = 340,772 : x
  2. Step 2: Convert to fraction form
    612,705.20/845,525.28 = 340,772/x
  3. Step 3: Cross multiply
    612,705.20x = 845,525.28 × 340,772
  4. Step 4: Simplify right side
    612,705.20x = 288,131,340,716.16
  5. Step 5: Solve for x
    x = 288,131,340,716.16/612,705.20
  6. Step 6: Final answer
    x = 470,260.97

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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.