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Finding the Fourth Proportional to 720,353.15, 994,087.68 and 398,063.24

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Solution

The fourth proportional to 720,353.15, 994,087.68 and 398,063.24 is: 549,327.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,353.15 : 994,087.68 = 398,063.24 : x
  2. Step 2: Convert to fraction form
    720,353.15/994,087.68 = 398,063.24/x
  3. Step 3: Cross multiply
    720,353.15x = 994,087.68 × 398,063.24
  4. Step 4: Simplify right side
    720,353.15x = 395,709,762,744.88
  5. Step 5: Solve for x
    x = 395,709,762,744.88/720,353.15
  6. Step 6: Final answer
    x = 549,327.46

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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.