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Finding the Fourth Proportional to 518,051.74, 715,017.75 and 326,936.86

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Solution

The fourth proportional to 518,051.74, 715,017.75 and 326,936.86 is: 451,239.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,051.74 : 715,017.75 = 326,936.86 : x
  2. Step 2: Convert to fraction form
    518,051.74/715,017.75 = 326,936.86/x
  3. Step 3: Cross multiply
    518,051.74x = 715,017.75 × 326,936.86
  4. Step 4: Simplify right side
    518,051.74x = 233,765,658,029.27
  5. Step 5: Solve for x
    x = 233,765,658,029.27/518,051.74
  6. Step 6: Final answer
    x = 451,239.98

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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.