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Finding the Fourth Proportional to 620,656.11, 856,452.42 and 348,702.66

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Solution

The fourth proportional to 620,656.11, 856,452.42 and 348,702.66 is: 481,179.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,656.11 : 856,452.42 = 348,702.66 : x
  2. Step 2: Convert to fraction form
    620,656.11/856,452.42 = 348,702.66/x
  3. Step 3: Cross multiply
    620,656.11x = 856,452.42 × 348,702.66
  4. Step 4: Simplify right side
    620,656.11x = 298,647,237,017.44
  5. Step 5: Solve for x
    x = 298,647,237,017.44/620,656.11
  6. Step 6: Final answer
    x = 481,179.89

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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.