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Finding the Fourth Proportional to 449,613.54, 620,881.05 and 288,748.86

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Solution

The fourth proportional to 449,613.54, 620,881.05 and 288,748.86 is: 398,739.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,613.54 : 620,881.05 = 288,748.86 : x
  2. Step 2: Convert to fraction form
    449,613.54/620,881.05 = 288,748.86/x
  3. Step 3: Cross multiply
    449,613.54x = 620,881.05 × 288,748.86
  4. Step 4: Simplify right side
    449,613.54x = 179,278,695,383.10
  5. Step 5: Solve for x
    x = 179,278,695,383.10/449,613.54
  6. Step 6: Final answer
    x = 398,739.54

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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.