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Finding the Fourth Proportional to 291,295.40, 437,112.90 and 122,805.40

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Solution

The fourth proportional to 291,295.40, 437,112.90 and 122,805.40 is: 184,279.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,295.40 : 437,112.90 = 122,805.40 : x
  2. Step 2: Convert to fraction form
    291,295.40/437,112.90 = 122,805.40/x
  3. Step 3: Cross multiply
    291,295.40x = 437,112.90 × 122,805.40
  4. Step 4: Simplify right side
    291,295.40x = 53,679,824,529.66
  5. Step 5: Solve for x
    x = 53,679,824,529.66/291,295.40
  6. Step 6: Final answer
    x = 184,279.68

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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.