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Finding the Fourth Proportional to 518,690.51, 715,796.02 and 289,262.30

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Solution

The fourth proportional to 518,690.51, 715,796.02 and 289,262.30 is: 399,183.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,690.51 : 715,796.02 = 289,262.30 : x
  2. Step 2: Convert to fraction form
    518,690.51/715,796.02 = 289,262.30/x
  3. Step 3: Cross multiply
    518,690.51x = 715,796.02 × 289,262.30
  4. Step 4: Simplify right side
    518,690.51x = 207,052,799,858.64
  5. Step 5: Solve for x
    x = 207,052,799,858.64/518,690.51
  6. Step 6: Final answer
    x = 399,183.71

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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.