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Finding the Fourth Proportional to 713,791.36, 985,267.60 and 638,123.29

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Solution

The fourth proportional to 713,791.36, 985,267.60 and 638,123.29 is: 880,820.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,791.36 : 985,267.60 = 638,123.29 : x
  2. Step 2: Convert to fraction form
    713,791.36/985,267.60 = 638,123.29/x
  3. Step 3: Cross multiply
    713,791.36x = 985,267.60 × 638,123.29
  4. Step 4: Simplify right side
    713,791.36x = 628,722,198,383.93
  5. Step 5: Solve for x
    x = 628,722,198,383.93/713,791.36
  6. Step 6: Final answer
    x = 880,820.69

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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.