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Finding the Fourth Proportional to 665,177.31, 917,945.52 and 378,697.39

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Solution

The fourth proportional to 665,177.31, 917,945.52 and 378,697.39 is: 522,602.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,177.31 : 917,945.52 = 378,697.39 : x
  2. Step 2: Convert to fraction form
    665,177.31/917,945.52 = 378,697.39/x
  3. Step 3: Cross multiply
    665,177.31x = 917,945.52 × 378,697.39
  4. Step 4: Simplify right side
    665,177.31x = 347,623,572,586.19
  5. Step 5: Solve for x
    x = 347,623,572,586.19/665,177.31
  6. Step 6: Final answer
    x = 522,602.87

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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.