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Finding the Fourth Proportional to 720,353.34, 994,147.47 and 398,126.34

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Solution

The fourth proportional to 720,353.34, 994,147.47 and 398,126.34 is: 549,447.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,353.34 : 994,147.47 = 398,126.34 : x
  2. Step 2: Convert to fraction form
    720,353.34/994,147.47 = 398,126.34/x
  3. Step 3: Cross multiply
    720,353.34x = 994,147.47 × 398,126.34
  4. Step 4: Simplify right side
    720,353.34x = 395,796,293,651.36
  5. Step 5: Solve for x
    x = 395,796,293,651.36/720,353.34
  6. Step 6: Final answer
    x = 549,447.43

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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.