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Finding the Fourth Proportional to 665,175.85, 917,943.54 and 378,695.93

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Solution

The fourth proportional to 665,175.85, 917,943.54 and 378,695.93 is: 522,600.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,175.85 : 917,943.54 = 378,695.93 : x
  2. Step 2: Convert to fraction form
    665,175.85/917,943.54 = 378,695.93/x
  3. Step 3: Cross multiply
    665,175.85x = 917,943.54 × 378,695.93
  4. Step 4: Simplify right side
    665,175.85x = 347,621,481,721.40
  5. Step 5: Solve for x
    x = 347,621,481,721.40/665,175.85
  6. Step 6: Final answer
    x = 522,600.87

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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.