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Finding the Fourth Proportional to 291,990.60, 437,985.90 and 104,977.80

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Solution

The fourth proportional to 291,990.60, 437,985.90 and 104,977.80 is: 157,466.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,990.60 : 437,985.90 = 104,977.80 : x
  2. Step 2: Convert to fraction form
    291,990.60/437,985.90 = 104,977.80/x
  3. Step 3: Cross multiply
    291,990.60x = 437,985.90 × 104,977.80
  4. Step 4: Simplify right side
    291,990.60x = 45,978,796,213.02
  5. Step 5: Solve for x
    x = 45,978,796,213.02/291,990.60
  6. Step 6: Final answer
    x = 157,466.70

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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.