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Finding the Fourth Proportional to 351,656.57, 527,484.87 and 85,415.29

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Solution

The fourth proportional to 351,656.57, 527,484.87 and 85,415.29 is: 128,122.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,656.57 : 527,484.87 = 85,415.29 : x
  2. Step 2: Convert to fraction form
    351,656.57/527,484.87 = 85,415.29/x
  3. Step 3: Cross multiply
    351,656.57x = 527,484.87 × 85,415.29
  4. Step 4: Simplify right side
    351,656.57x = 45,055,274,790.05
  5. Step 5: Solve for x
    x = 45,055,274,790.05/351,656.57
  6. Step 6: Final answer
    x = 128,122.94

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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.