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Finding the Fourth Proportional to 720,901.80, 994,804.38 and 398,592.54

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Solution

The fourth proportional to 720,901.80, 994,804.38 and 398,592.54 is: 550,035.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,901.80 : 994,804.38 = 398,592.54 : x
  2. Step 2: Convert to fraction form
    720,901.80/994,804.38 = 398,592.54/x
  3. Step 3: Cross multiply
    720,901.80x = 994,804.38 × 398,592.54
  4. Step 4: Simplify right side
    720,901.80x = 396,521,604,627.33
  5. Step 5: Solve for x
    x = 396,521,604,627.33/720,901.80
  6. Step 6: Final answer
    x = 550,035.53

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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.