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Finding the Fourth Proportional to 386,016.66, 579,006.45 and 105,534.54

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Solution

The fourth proportional to 386,016.66, 579,006.45 and 105,534.54 is: 158,296.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,016.66 : 579,006.45 = 105,534.54 : x
  2. Step 2: Convert to fraction form
    386,016.66/579,006.45 = 105,534.54/x
  3. Step 3: Cross multiply
    386,016.66x = 579,006.45 × 105,534.54
  4. Step 4: Simplify right side
    386,016.66x = 61,105,179,357.78
  5. Step 5: Solve for x
    x = 61,105,179,357.78/386,016.66
  6. Step 6: Final answer
    x = 158,296.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.