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Finding the Fourth Proportional to 382,690.20, 574,035.30 and 330,202.20

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Solution

The fourth proportional to 382,690.20, 574,035.30 and 330,202.20 is: 495,303.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,690.20 : 574,035.30 = 330,202.20 : x
  2. Step 2: Convert to fraction form
    382,690.20/574,035.30 = 330,202.20/x
  3. Step 3: Cross multiply
    382,690.20x = 574,035.30 × 330,202.20
  4. Step 4: Simplify right side
    382,690.20x = 189,547,718,937.66
  5. Step 5: Solve for x
    x = 189,547,718,937.66/382,690.20
  6. Step 6: Final answer
    x = 495,303.30

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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.