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Finding the Fourth Proportional to 720,722.06, 994,510.07 and 398,388.34

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Solution

The fourth proportional to 720,722.06, 994,510.07 and 398,388.34 is: 549,728.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,722.06 : 994,510.07 = 398,388.34 : x
  2. Step 2: Convert to fraction form
    720,722.06/994,510.07 = 398,388.34/x
  3. Step 3: Cross multiply
    720,722.06x = 994,510.07 × 398,388.34
  4. Step 4: Simplify right side
    720,722.06x = 396,201,211,422.37
  5. Step 5: Solve for x
    x = 396,201,211,422.37/720,722.06
  6. Step 6: Final answer
    x = 549,728.16

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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.