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Finding the Fourth Proportional to 393,842.99, 543,284.48 and 258,095.90

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Solution

The fourth proportional to 393,842.99, 543,284.48 and 258,095.90 is: 356,028.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,842.99 : 543,284.48 = 258,095.90 : x
  2. Step 2: Convert to fraction form
    393,842.99/543,284.48 = 258,095.90/x
  3. Step 3: Cross multiply
    393,842.99x = 543,284.48 × 258,095.90
  4. Step 4: Simplify right side
    393,842.99x = 140,219,498,825.08
  5. Step 5: Solve for x
    x = 140,219,498,825.08/393,842.99
  6. Step 6: Final answer
    x = 356,028.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.