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Finding the Fourth Proportional to 303,445.20, 455,686.20 and 198,728.40

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Solution

The fourth proportional to 303,445.20, 455,686.20 and 198,728.40 is: 298,432.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,445.20 : 455,686.20 = 198,728.40 : x
  2. Step 2: Convert to fraction form
    303,445.20/455,686.20 = 198,728.40/x
  3. Step 3: Cross multiply
    303,445.20x = 455,686.20 × 198,728.40
  4. Step 4: Simplify right side
    303,445.20x = 90,557,789,428.08
  5. Step 5: Solve for x
    x = 90,557,789,428.08/303,445.20
  6. Step 6: Final answer
    x = 298,432.10

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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.