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Finding the Fourth Proportional to 859,866.36, 1,289,802.54 and 260,832.68

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Solution

The fourth proportional to 859,866.36, 1,289,802.54 and 260,832.68 is: 391,249.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,866.36 : 1,289,802.54 = 260,832.68 : x
  2. Step 2: Convert to fraction form
    859,866.36/1,289,802.54 = 260,832.68/x
  3. Step 3: Cross multiply
    859,866.36x = 1,289,802.54 × 260,832.68
  4. Step 4: Simplify right side
    859,866.36x = 336,422,653,179.01
  5. Step 5: Solve for x
    x = 336,422,653,179.01/859,866.36
  6. Step 6: Final answer
    x = 391,249.93

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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.