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Finding the Fourth Proportional to 386,054.40, 579,081.60 and 260,083.20

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Solution

The fourth proportional to 386,054.40, 579,081.60 and 260,083.20 is: 390,124.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,054.40 : 579,081.60 = 260,083.20 : x
  2. Step 2: Convert to fraction form
    386,054.40/579,081.60 = 260,083.20/x
  3. Step 3: Cross multiply
    386,054.40x = 579,081.60 × 260,083.20
  4. Step 4: Simplify right side
    386,054.40x = 150,609,395,589.12
  5. Step 5: Solve for x
    x = 150,609,395,589.12/386,054.40
  6. Step 6: Final answer
    x = 390,124.80

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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.