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Finding the Fourth Proportional to 291,217.78, 401,888.55 and 163,897.93

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Solution

The fourth proportional to 291,217.78, 401,888.55 and 163,897.93 is: 226,183.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,217.78 : 401,888.55 = 163,897.93 : x
  2. Step 2: Convert to fraction form
    291,217.78/401,888.55 = 163,897.93/x
  3. Step 3: Cross multiply
    291,217.78x = 401,888.55 × 163,897.93
  4. Step 4: Simplify right side
    291,217.78x = 65,868,701,435.70
  5. Step 5: Solve for x
    x = 65,868,701,435.70/291,217.78
  6. Step 6: Final answer
    x = 226,183.65

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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.