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Finding the Fourth Proportional to 665,179.06, 917,947.94 and 378,699.14

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Solution

The fourth proportional to 665,179.06, 917,947.94 and 378,699.14 is: 522,605.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,179.06 : 917,947.94 = 378,699.14 : x
  2. Step 2: Convert to fraction form
    665,179.06/917,947.94 = 378,699.14/x
  3. Step 3: Cross multiply
    665,179.06x = 917,947.94 × 378,699.14
  4. Step 4: Simplify right side
    665,179.06x = 347,626,095,442.77
  5. Step 5: Solve for x
    x = 347,626,095,442.77/665,179.06
  6. Step 6: Final answer
    x = 522,605.29

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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.