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Finding the Fourth Proportional to 455,327.70, 682,991.55 and 139,743.60

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Solution

The fourth proportional to 455,327.70, 682,991.55 and 139,743.60 is: 209,615.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,327.70 : 682,991.55 = 139,743.60 : x
  2. Step 2: Convert to fraction form
    455,327.70/682,991.55 = 139,743.60/x
  3. Step 3: Cross multiply
    455,327.70x = 682,991.55 × 139,743.60
  4. Step 4: Simplify right side
    455,327.70x = 95,443,697,966.58
  5. Step 5: Solve for x
    x = 95,443,697,966.58/455,327.70
  6. Step 6: Final answer
    x = 209,615.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.