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Finding the Fourth Proportional to 666,425.52, 919,293.44 and 408,427.48

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Solution

The fourth proportional to 666,425.52, 919,293.44 and 408,427.48 is: 563,400.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,425.52 : 919,293.44 = 408,427.48 : x
  2. Step 2: Convert to fraction form
    666,425.52/919,293.44 = 408,427.48/x
  3. Step 3: Cross multiply
    666,425.52x = 919,293.44 × 408,427.48
  4. Step 4: Simplify right side
    666,425.52x = 375,464,703,079.73
  5. Step 5: Solve for x
    x = 375,464,703,079.73/666,425.52
  6. Step 6: Final answer
    x = 563,400.85

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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.