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Finding the Fourth Proportional to 720,954.06, 994,889.70 and 398,658.30

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Solution

The fourth proportional to 720,954.06, 994,889.70 and 398,658.30 is: 550,133.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,954.06 : 994,889.70 = 398,658.30 : x
  2. Step 2: Convert to fraction form
    720,954.06/994,889.70 = 398,658.30/x
  3. Step 3: Cross multiply
    720,954.06x = 994,889.70 × 398,658.30
  4. Step 4: Simplify right side
    720,954.06x = 396,621,036,489.51
  5. Step 5: Solve for x
    x = 396,621,036,489.51/720,954.06
  6. Step 6: Final answer
    x = 550,133.58

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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.