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Finding the Fourth Proportional to 666,422.31, 918,706.25 and 475,103.55

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Solution

The fourth proportional to 666,422.31, 918,706.25 and 475,103.55 is: 654,960.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,422.31 : 918,706.25 = 475,103.55 : x
  2. Step 2: Convert to fraction form
    666,422.31/918,706.25 = 475,103.55/x
  3. Step 3: Cross multiply
    666,422.31x = 918,706.25 × 475,103.55
  4. Step 4: Simplify right side
    666,422.31x = 436,480,601,891.19
  5. Step 5: Solve for x
    x = 436,480,601,891.19/666,422.31
  6. Step 6: Final answer
    x = 654,960.97

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1.5x scale

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.