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Finding the Fourth Proportional to 720,369.58, 994,083.27 and 398,072.98

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Solution

The fourth proportional to 720,369.58, 994,083.27 and 398,072.98 is: 549,325.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,369.58 : 994,083.27 = 398,072.98 : x
  2. Step 2: Convert to fraction form
    720,369.58/994,083.27 = 398,072.98/x
  3. Step 3: Cross multiply
    720,369.58x = 994,083.27 × 398,072.98
  4. Step 4: Simplify right side
    720,369.58x = 395,717,689,657.05
  5. Step 5: Solve for x
    x = 395,717,689,657.05/720,369.58
  6. Step 6: Final answer
    x = 549,325.93

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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.