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Finding the Fourth Proportional to 386,259, 579,362.58 and 105,778.68

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Solution

The fourth proportional to 386,259, 579,362.58 and 105,778.68 is: 158,660.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,259 : 579,362.58 = 105,778.68 : x
  2. Step 2: Convert to fraction form
    386,259/579,362.58 = 105,778.68/x
  3. Step 3: Cross multiply
    386,259x = 579,362.58 × 105,778.68
  4. Step 4: Simplify right side
    386,259x = 61,284,208,953.79
  5. Step 5: Solve for x
    x = 61,284,208,953.79/386,259
  6. Step 6: Final answer
    x = 158,660.92

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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.