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Finding the Fourth Proportional to 438,627.60, 657,431.10 and 201,994.20

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Solution

The fourth proportional to 438,627.60, 657,431.10 and 201,994.20 is: 302,756.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,627.60 : 657,431.10 = 201,994.20 : x
  2. Step 2: Convert to fraction form
    438,627.60/657,431.10 = 201,994.20/x
  3. Step 3: Cross multiply
    438,627.60x = 657,431.10 × 201,994.20
  4. Step 4: Simplify right side
    438,627.60x = 132,797,269,099.62
  5. Step 5: Solve for x
    x = 132,797,269,099.62/438,627.60
  6. Step 6: Final answer
    x = 302,756.30

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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.