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Finding the Fourth Proportional to 851,018, 1,276,745.76 and 318,546.72

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Solution

The fourth proportional to 851,018, 1,276,745.76 and 318,546.72 is: 477,901.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,018 : 1,276,745.76 = 318,546.72 : x
  2. Step 2: Convert to fraction form
    851,018/1,276,745.76 = 318,546.72/x
  3. Step 3: Cross multiply
    851,018x = 1,276,745.76 × 318,546.72
  4. Step 4: Simplify right side
    851,018x = 406,703,174,121.91
  5. Step 5: Solve for x
    x = 406,703,174,121.91/851,018
  6. Step 6: Final answer
    x = 477,901.96

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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.