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Finding the Fourth Proportional to 665,120.37, 917,866.07 and 359,196.72

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Solution

The fourth proportional to 665,120.37, 917,866.07 and 359,196.72 is: 495,691.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,120.37 : 917,866.07 = 359,196.72 : x
  2. Step 2: Convert to fraction form
    665,120.37/917,866.07 = 359,196.72/x
  3. Step 3: Cross multiply
    665,120.37x = 917,866.07 × 359,196.72
  4. Step 4: Simplify right side
    665,120.37x = 329,694,485,035.78
  5. Step 5: Solve for x
    x = 329,694,485,035.78/665,120.37
  6. Step 6: Final answer
    x = 495,691.46

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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.