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Finding the Fourth Proportional to 455,336.40, 682,421.40 and 349,631.40

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Solution

The fourth proportional to 455,336.40, 682,421.40 and 349,631.40 is: 523,999.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,336.40 : 682,421.40 = 349,631.40 : x
  2. Step 2: Convert to fraction form
    455,336.40/682,421.40 = 349,631.40/x
  3. Step 3: Cross multiply
    455,336.40x = 682,421.40 × 349,631.40
  4. Step 4: Simplify right side
    455,336.40x = 238,595,949,471.96
  5. Step 5: Solve for x
    x = 238,595,949,471.96/455,336.40
  6. Step 6: Final answer
    x = 523,999.29

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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.