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Finding the Fourth Proportional to 390,062.27, 538,296.59 and 220,296.39

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Solution

The fourth proportional to 390,062.27, 538,296.59 and 220,296.39 is: 304,015.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,062.27 : 538,296.59 = 220,296.39 : x
  2. Step 2: Convert to fraction form
    390,062.27/538,296.59 = 220,296.39/x
  3. Step 3: Cross multiply
    390,062.27x = 538,296.59 × 220,296.39
  4. Step 4: Simplify right side
    390,062.27x = 118,584,794,424.83
  5. Step 5: Solve for x
    x = 118,584,794,424.83/390,062.27
  6. Step 6: Final answer
    x = 304,015.04

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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.