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Finding the Fourth Proportional to 286,647.78, 395,579.01 and 157,591.71

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Solution

The fourth proportional to 286,647.78, 395,579.01 and 157,591.71 is: 217,479.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,647.78 : 395,579.01 = 157,591.71 : x
  2. Step 2: Convert to fraction form
    286,647.78/395,579.01 = 157,591.71/x
  3. Step 3: Cross multiply
    286,647.78x = 395,579.01 × 157,591.71
  4. Step 4: Simplify right side
    286,647.78x = 62,339,972,626.01
  5. Step 5: Solve for x
    x = 62,339,972,626.01/286,647.78
  6. Step 6: Final answer
    x = 217,479.35

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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.