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Finding the Fourth Proportional to 386,304.80, 579,368.60 and 105,843.92

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Solution

The fourth proportional to 386,304.80, 579,368.60 and 105,843.92 is: 158,741.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,304.80 : 579,368.60 = 105,843.92 : x
  2. Step 2: Convert to fraction form
    386,304.80/579,368.60 = 105,843.92/x
  3. Step 3: Cross multiply
    386,304.80x = 579,368.60 × 105,843.92
  4. Step 4: Simplify right side
    386,304.80x = 61,322,643,748.91
  5. Step 5: Solve for x
    x = 61,322,643,748.91/386,304.80
  6. Step 6: Final answer
    x = 158,741.60

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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.