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Finding the Fourth Proportional to 520,064.24, 779,941.80 and 220,540.40

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Solution

The fourth proportional to 520,064.24, 779,941.80 and 220,540.40 is: 330,745.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,064.24 : 779,941.80 = 220,540.40 : x
  2. Step 2: Convert to fraction form
    520,064.24/779,941.80 = 220,540.40/x
  3. Step 3: Cross multiply
    520,064.24x = 779,941.80 × 220,540.40
  4. Step 4: Simplify right side
    520,064.24x = 172,008,676,548.72
  5. Step 5: Solve for x
    x = 172,008,676,548.72/520,064.24
  6. Step 6: Final answer
    x = 330,745.06

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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.