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Finding the Fourth Proportional to 291,374.40, 436,821.60 and 131,460.80

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Solution

The fourth proportional to 291,374.40, 436,821.60 and 131,460.80 is: 197,082.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,374.40 : 436,821.60 = 131,460.80 : x
  2. Step 2: Convert to fraction form
    291,374.40/436,821.60 = 131,460.80/x
  3. Step 3: Cross multiply
    291,374.40x = 436,821.60 × 131,460.80
  4. Step 4: Simplify right side
    291,374.40x = 57,424,916,993.28
  5. Step 5: Solve for x
    x = 57,424,916,993.28/291,374.40
  6. Step 6: Final answer
    x = 197,082.92

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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.