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Finding the Fourth Proportional to 385,708.69, 578,451.32 and 115,825.93

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Solution

The fourth proportional to 385,708.69, 578,451.32 and 115,825.93 is: 173,705.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,708.69 : 578,451.32 = 115,825.93 : x
  2. Step 2: Convert to fraction form
    385,708.69/578,451.32 = 115,825.93/x
  3. Step 3: Cross multiply
    385,708.69x = 578,451.32 × 115,825.93
  4. Step 4: Simplify right side
    385,708.69x = 66,999,660,942.16
  5. Step 5: Solve for x
    x = 66,999,660,942.16/385,708.69
  6. Step 6: Final answer
    x = 173,705.35

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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.