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Finding the Fourth Proportional to 867,904.69, 1,300,938.48 and 394,922.20

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Solution

The fourth proportional to 867,904.69, 1,300,938.48 and 394,922.20 is: 591,965.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,904.69 : 1,300,938.48 = 394,922.20 : x
  2. Step 2: Convert to fraction form
    867,904.69/1,300,938.48 = 394,922.20/x
  3. Step 3: Cross multiply
    867,904.69x = 1,300,938.48 × 394,922.20
  4. Step 4: Simplify right side
    867,904.69x = 513,769,486,586.26
  5. Step 5: Solve for x
    x = 513,769,486,586.26/867,904.69
  6. Step 6: Final answer
    x = 591,965.33

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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.