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Finding the Fourth Proportional to 351,657.22, 527,485.83 and 85,415.94

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Solution

The fourth proportional to 351,657.22, 527,485.83 and 85,415.94 is: 128,123.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,657.22 : 527,485.83 = 85,415.94 : x
  2. Step 2: Convert to fraction form
    351,657.22/527,485.83 = 85,415.94/x
  3. Step 3: Cross multiply
    351,657.22x = 527,485.83 × 85,415.94
  4. Step 4: Simplify right side
    351,657.22x = 45,055,695,368.70
  5. Step 5: Solve for x
    x = 45,055,695,368.70/351,657.22
  6. Step 6: Final answer
    x = 128,123.90

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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.