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Finding the Fourth Proportional to 291,912.60, 438,041.84 and 123,423.72

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Solution

The fourth proportional to 291,912.60, 438,041.84 and 123,423.72 is: 185,208.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,912.60 : 438,041.84 = 123,423.72 : x
  2. Step 2: Convert to fraction form
    291,912.60/438,041.84 = 123,423.72/x
  3. Step 3: Cross multiply
    291,912.60x = 438,041.84 × 123,423.72
  4. Step 4: Simplify right side
    291,912.60x = 54,064,753,408.44
  5. Step 5: Solve for x
    x = 54,064,753,408.44/291,912.60
  6. Step 6: Final answer
    x = 185,208.70

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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.