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Finding the Fourth Proportional to 290,989.58, 436,484.54 and 80,627.51

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Solution

The fourth proportional to 290,989.58, 436,484.54 and 80,627.51 is: 120,941.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,989.58 : 436,484.54 = 80,627.51 : x
  2. Step 2: Convert to fraction form
    290,989.58/436,484.54 = 80,627.51/x
  3. Step 3: Cross multiply
    290,989.58x = 436,484.54 × 80,627.51
  4. Step 4: Simplify right side
    290,989.58x = 35,192,662,953.37
  5. Step 5: Solve for x
    x = 35,192,662,953.37/290,989.58
  6. Step 6: Final answer
    x = 120,941.32

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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.