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Finding the Fourth Proportional to 647,728.20, 970,280.10 and 366,917.40

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Solution

The fourth proportional to 647,728.20, 970,280.10 and 366,917.40 is: 549,632.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,728.20 : 970,280.10 = 366,917.40 : x
  2. Step 2: Convert to fraction form
    647,728.20/970,280.10 = 366,917.40/x
  3. Step 3: Cross multiply
    647,728.20x = 970,280.10 × 366,917.40
  4. Step 4: Simplify right side
    647,728.20x = 356,012,651,563.74
  5. Step 5: Solve for x
    x = 356,012,651,563.74/647,728.20
  6. Step 6: Final answer
    x = 549,632.78

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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.