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Finding the Fourth Proportional to 449,648.72, 620,640.32 and 258,723.60

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Solution

The fourth proportional to 449,648.72, 620,640.32 and 258,723.60 is: 357,110.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,648.72 : 620,640.32 = 258,723.60 : x
  2. Step 2: Convert to fraction form
    449,648.72/620,640.32 = 258,723.60/x
  3. Step 3: Cross multiply
    449,648.72x = 620,640.32 × 258,723.60
  4. Step 4: Simplify right side
    449,648.72x = 160,574,297,895.55
  5. Step 5: Solve for x
    x = 160,574,297,895.55/449,648.72
  6. Step 6: Final answer
    x = 357,110.54

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1.5x scale

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.