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Finding the Fourth Proportional to 358,021.63, 536,992.34 and 91,788.40

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Solution

The fourth proportional to 358,021.63, 536,992.34 and 91,788.40 is: 137,672.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,021.63 : 536,992.34 = 91,788.40 : x
  2. Step 2: Convert to fraction form
    358,021.63/536,992.34 = 91,788.40/x
  3. Step 3: Cross multiply
    358,021.63x = 536,992.34 × 91,788.40
  4. Step 4: Simplify right side
    358,021.63x = 49,289,666,587.85
  5. Step 5: Solve for x
    x = 49,289,666,587.85/358,021.63
  6. Step 6: Final answer
    x = 137,672.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.