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Finding the Fourth Proportional to 451,374.60, 622,613.70 and 290,438.76

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Solution

The fourth proportional to 451,374.60, 622,613.70 and 290,438.76 is: 400,623.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,374.60 : 622,613.70 = 290,438.76 : x
  2. Step 2: Convert to fraction form
    451,374.60/622,613.70 = 290,438.76/x
  3. Step 3: Cross multiply
    451,374.60x = 622,613.70 × 290,438.76
  4. Step 4: Simplify right side
    451,374.60x = 180,831,150,987.01
  5. Step 5: Solve for x
    x = 180,831,150,987.01/451,374.60
  6. Step 6: Final answer
    x = 400,623.23

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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.