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Finding the Fourth Proportional to 618,995.20, 928,363.20 and 303,678.40

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Solution

The fourth proportional to 618,995.20, 928,363.20 and 303,678.40 is: 455,454.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,995.20 : 928,363.20 = 303,678.40 : x
  2. Step 2: Convert to fraction form
    618,995.20/928,363.20 = 303,678.40/x
  3. Step 3: Cross multiply
    618,995.20x = 928,363.20 × 303,678.40
  4. Step 4: Simplify right side
    618,995.20x = 281,923,851,194.88
  5. Step 5: Solve for x
    x = 281,923,851,194.88/618,995.20
  6. Step 6: Final answer
    x = 455,454.02

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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.