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Finding the Fourth Proportional to 666,869.67, 920,280.05 and 360,945.97

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Solution

The fourth proportional to 666,869.67, 920,280.05 and 360,945.97 is: 498,105.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,869.67 : 920,280.05 = 360,945.97 : x
  2. Step 2: Convert to fraction form
    666,869.67/920,280.05 = 360,945.97/x
  3. Step 3: Cross multiply
    666,869.67x = 920,280.05 × 360,945.97
  4. Step 4: Simplify right side
    666,869.67x = 332,171,372,567.02
  5. Step 5: Solve for x
    x = 332,171,372,567.02/666,869.67
  6. Step 6: Final answer
    x = 498,105.38

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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.