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Finding the Fourth Proportional to 620,634.30, 856,501.78 and 348,702.72

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Solution

The fourth proportional to 620,634.30, 856,501.78 and 348,702.72 is: 481,224.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,634.30 : 856,501.78 = 348,702.72 : x
  2. Step 2: Convert to fraction form
    620,634.30/856,501.78 = 348,702.72/x
  3. Step 3: Cross multiply
    620,634.30x = 856,501.78 × 348,702.72
  4. Step 4: Simplify right side
    620,634.30x = 298,664,500,370.84
  5. Step 5: Solve for x
    x = 298,664,500,370.84/620,634.30
  6. Step 6: Final answer
    x = 481,224.61

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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.