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Finding the Fourth Proportional to 355,408.20, 532,917.90 and 144,808.20

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Solution

The fourth proportional to 355,408.20, 532,917.90 and 144,808.20 is: 217,133.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,408.20 : 532,917.90 = 144,808.20 : x
  2. Step 2: Convert to fraction form
    355,408.20/532,917.90 = 144,808.20/x
  3. Step 3: Cross multiply
    355,408.20x = 532,917.90 × 144,808.20
  4. Step 4: Simplify right side
    355,408.20x = 77,170,881,846.78
  5. Step 5: Solve for x
    x = 77,170,881,846.78/355,408.20
  6. Step 6: Final answer
    x = 217,133.09

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1.5x scale

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.