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Finding the Fourth Proportional to 340,578.74, 469,998.69 and 197,421.86

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Solution

The fourth proportional to 340,578.74, 469,998.69 and 197,421.86 is: 272,442.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,578.74 : 469,998.69 = 197,421.86 : x
  2. Step 2: Convert to fraction form
    340,578.74/469,998.69 = 197,421.86/x
  3. Step 3: Cross multiply
    340,578.74x = 469,998.69 × 197,421.86
  4. Step 4: Simplify right side
    340,578.74x = 92,788,015,577.36
  5. Step 5: Solve for x
    x = 92,788,015,577.36/340,578.74
  6. Step 6: Final answer
    x = 272,442.18

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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.