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Finding the Fourth Proportional to 401,877.72, 553,999.14 and 306,218.52

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Solution

The fourth proportional to 401,877.72, 553,999.14 and 306,218.52 is: 422,130.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,877.72 : 553,999.14 = 306,218.52 : x
  2. Step 2: Convert to fraction form
    401,877.72/553,999.14 = 306,218.52/x
  3. Step 3: Cross multiply
    401,877.72x = 553,999.14 × 306,218.52
  4. Step 4: Simplify right side
    401,877.72x = 169,644,796,732.07
  5. Step 5: Solve for x
    x = 169,644,796,732.07/401,877.72
  6. Step 6: Final answer
    x = 422,130.39

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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.