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Finding the Fourth Proportional to 297,642.60, 446,131.80 and 128,968.20

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Solution

The fourth proportional to 297,642.60, 446,131.80 and 128,968.20 is: 193,308.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,642.60 : 446,131.80 = 128,968.20 : x
  2. Step 2: Convert to fraction form
    297,642.60/446,131.80 = 128,968.20/x
  3. Step 3: Cross multiply
    297,642.60x = 446,131.80 × 128,968.20
  4. Step 4: Simplify right side
    297,642.60x = 57,536,815,208.76
  5. Step 5: Solve for x
    x = 57,536,815,208.76/297,642.60
  6. Step 6: Final answer
    x = 193,308.40

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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.