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Finding the Fourth Proportional to 666,422.57, 918,706.60 and 475,103.81

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Solution

The fourth proportional to 666,422.57, 918,706.60 and 475,103.81 is: 654,961.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,422.57 : 918,706.60 = 475,103.81 : x
  2. Step 2: Convert to fraction form
    666,422.57/918,706.60 = 475,103.81/x
  3. Step 3: Cross multiply
    666,422.57x = 918,706.60 × 475,103.81
  4. Step 4: Simplify right side
    666,422.57x = 436,480,998,963.09
  5. Step 5: Solve for x
    x = 436,480,998,963.09/666,422.57
  6. Step 6: Final answer
    x = 654,961.31

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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.