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Finding the Fourth Proportional to 368,431.20, 552,646.80 and 131,781.60

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Solution

The fourth proportional to 368,431.20, 552,646.80 and 131,781.60 is: 197,672.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,431.20 : 552,646.80 = 131,781.60 : x
  2. Step 2: Convert to fraction form
    368,431.20/552,646.80 = 131,781.60/x
  3. Step 3: Cross multiply
    368,431.20x = 552,646.80 × 131,781.60
  4. Step 4: Simplify right side
    368,431.20x = 72,828,679,538.88
  5. Step 5: Solve for x
    x = 72,828,679,538.88/368,431.20
  6. Step 6: Final answer
    x = 197,672.40

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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.