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Finding the Fourth Proportional to 386,260, 579,364.08 and 105,779.68

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Solution

The fourth proportional to 386,260, 579,364.08 and 105,779.68 is: 158,662.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,260 : 579,364.08 = 105,779.68 : x
  2. Step 2: Convert to fraction form
    386,260/579,364.08 = 105,779.68/x
  3. Step 3: Cross multiply
    386,260x = 579,364.08 × 105,779.68
  4. Step 4: Simplify right side
    386,260x = 61,284,946,985.89
  5. Step 5: Solve for x
    x = 61,284,946,985.89/386,260
  6. Step 6: Final answer
    x = 158,662.42

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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.