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Finding the Fourth Proportional to 298,986.88, 448,226.31 and 139,155.63

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Solution

The fourth proportional to 298,986.88, 448,226.31 and 139,155.63 is: 208,615.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,986.88 : 448,226.31 = 139,155.63 : x
  2. Step 2: Convert to fraction form
    298,986.88/448,226.31 = 139,155.63/x
  3. Step 3: Cross multiply
    298,986.88x = 448,226.31 × 139,155.63
  4. Step 4: Simplify right side
    298,986.88x = 62,373,213,869.50
  5. Step 5: Solve for x
    x = 62,373,213,869.50/298,986.88
  6. Step 6: Final answer
    x = 208,615.22

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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.