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Finding the Fourth Proportional to 243,043.60, 364,565.40 and 198,720.40

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Solution

The fourth proportional to 243,043.60, 364,565.40 and 198,720.40 is: 298,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,043.60 : 364,565.40 = 198,720.40 : x
  2. Step 2: Convert to fraction form
    243,043.60/364,565.40 = 198,720.40/x
  3. Step 3: Cross multiply
    243,043.60x = 364,565.40 × 198,720.40
  4. Step 4: Simplify right side
    243,043.60x = 72,446,582,114.16
  5. Step 5: Solve for x
    x = 72,446,582,114.16/243,043.60
  6. Step 6: Final answer
    x = 298,080.60

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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.