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Finding the Fourth Proportional to 647,428.20, 969,830.10 and 366,617.40

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Solution

The fourth proportional to 647,428.20, 969,830.10 and 366,617.40 is: 549,183.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,428.20 : 969,830.10 = 366,617.40 : x
  2. Step 2: Convert to fraction form
    647,428.20/969,830.10 = 366,617.40/x
  3. Step 3: Cross multiply
    647,428.20x = 969,830.10 × 366,617.40
  4. Step 4: Simplify right side
    647,428.20x = 355,556,589,703.74
  5. Step 5: Solve for x
    x = 355,556,589,703.74/647,428.20
  6. Step 6: Final answer
    x = 549,183.04

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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.