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Finding the Fourth Proportional to 390,292.98, 538,694.37 and 254,089.77

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Solution

The fourth proportional to 390,292.98, 538,694.37 and 254,089.77 is: 350,702.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,292.98 : 538,694.37 = 254,089.77 : x
  2. Step 2: Convert to fraction form
    390,292.98/538,694.37 = 254,089.77/x
  3. Step 3: Cross multiply
    390,292.98x = 538,694.37 × 254,089.77
  4. Step 4: Simplify right side
    390,292.98x = 136,876,728,573.60
  5. Step 5: Solve for x
    x = 136,876,728,573.60/390,292.98
  6. Step 6: Final answer
    x = 350,702.51

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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.