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Finding the Fourth Proportional to 720,971.73, 994,947.44 and 398,703.51

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Solution

The fourth proportional to 720,971.73, 994,947.44 and 398,703.51 is: 550,214.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,971.73 : 994,947.44 = 398,703.51 : x
  2. Step 2: Convert to fraction form
    720,971.73/994,947.44 = 398,703.51/x
  3. Step 3: Cross multiply
    720,971.73x = 994,947.44 × 398,703.51
  4. Step 4: Simplify right side
    720,971.73x = 396,689,034,600.00
  5. Step 5: Solve for x
    x = 396,689,034,600.00/720,971.73
  6. Step 6: Final answer
    x = 550,214.41

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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.