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Finding the Fourth Proportional to 667,280.89, 920,843.40 and 361,352.40

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Solution

The fourth proportional to 667,280.89, 920,843.40 and 361,352.40 is: 498,664.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,280.89 : 920,843.40 = 361,352.40 : x
  2. Step 2: Convert to fraction form
    667,280.89/920,843.40 = 361,352.40/x
  3. Step 3: Cross multiply
    667,280.89x = 920,843.40 × 361,352.40
  4. Step 4: Simplify right side
    667,280.89x = 332,748,972,614.16
  5. Step 5: Solve for x
    x = 332,748,972,614.16/667,280.89
  6. Step 6: Final answer
    x = 498,664.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.