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Finding the Fourth Proportional to 618,807.20, 928,081.20 and 303,490.40

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Solution

The fourth proportional to 618,807.20, 928,081.20 and 303,490.40 is: 455,172.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,807.20 : 928,081.20 = 303,490.40 : x
  2. Step 2: Convert to fraction form
    618,807.20/928,081.20 = 303,490.40/x
  3. Step 3: Cross multiply
    618,807.20x = 928,081.20 × 303,490.40
  4. Step 4: Simplify right side
    618,807.20x = 281,663,734,620.48
  5. Step 5: Solve for x
    x = 281,663,734,620.48/618,807.20
  6. Step 6: Final answer
    x = 455,172.04

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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.