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Finding the Fourth Proportional to 665,175.81, 917,943.45 and 378,695.89

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Solution

The fourth proportional to 665,175.81, 917,943.45 and 378,695.89 is: 522,600.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,175.81 : 917,943.45 = 378,695.89 : x
  2. Step 2: Convert to fraction form
    665,175.81/917,943.45 = 378,695.89/x
  3. Step 3: Cross multiply
    665,175.81x = 917,943.45 × 378,695.89
  4. Step 4: Simplify right side
    665,175.81x = 347,621,407,177.70
  5. Step 5: Solve for x
    x = 347,621,407,177.70/665,175.81
  6. Step 6: Final answer
    x = 522,600.80

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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.