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Finding the Fourth Proportional to 296,917.60, 445,408.80 and 287,586.40

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Solution

The fourth proportional to 296,917.60, 445,408.80 and 287,586.40 is: 431,410.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,917.60 : 445,408.80 = 287,586.40 : x
  2. Step 2: Convert to fraction form
    296,917.60/445,408.80 = 287,586.40/x
  3. Step 3: Cross multiply
    296,917.60x = 445,408.80 × 287,586.40
  4. Step 4: Simplify right side
    296,917.60x = 128,093,513,320.32
  5. Step 5: Solve for x
    x = 128,093,513,320.32/296,917.60
  6. Step 6: Final answer
    x = 431,410.98

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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.