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Finding the Fourth Proportional to 401,876.72, 553,997.76 and 306,217.52

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Solution

The fourth proportional to 401,876.72, 553,997.76 and 306,217.52 is: 422,129.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,876.72 : 553,997.76 = 306,217.52 : x
  2. Step 2: Convert to fraction form
    401,876.72/553,997.76 = 306,217.52/x
  3. Step 3: Cross multiply
    401,876.72x = 553,997.76 × 306,217.52
  4. Step 4: Simplify right side
    401,876.72x = 169,643,820,152.76
  5. Step 5: Solve for x
    x = 169,643,820,152.76/401,876.72
  6. Step 6: Final answer
    x = 422,129.01

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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.