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Finding the Fourth Proportional to 685,862.09, 946,489.73 and 379,958.30

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Solution

The fourth proportional to 685,862.09, 946,489.73 and 379,958.30 is: 524,342.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,862.09 : 946,489.73 = 379,958.30 : x
  2. Step 2: Convert to fraction form
    685,862.09/946,489.73 = 379,958.30/x
  3. Step 3: Cross multiply
    685,862.09x = 946,489.73 × 379,958.30
  4. Step 4: Simplify right side
    685,862.09x = 359,626,622,146.02
  5. Step 5: Solve for x
    x = 359,626,622,146.02/685,862.09
  6. Step 6: Final answer
    x = 524,342.47

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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.