Home / 427,220.25-640,411.20-237,771.38

Finding the Fourth Proportional to 427,220.25, 640,411.20 and 237,771.38

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Solution

The fourth proportional to 427,220.25, 640,411.20 and 237,771.38 is: 356,423.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,220.25 : 640,411.20 = 237,771.38 : x
  2. Step 2: Convert to fraction form
    427,220.25/640,411.20 = 237,771.38/x
  3. Step 3: Cross multiply
    427,220.25x = 640,411.20 × 237,771.38
  4. Step 4: Simplify right side
    427,220.25x = 152,271,451,589.40
  5. Step 5: Solve for x
    x = 152,271,451,589.40/427,220.25
  6. Step 6: Final answer
    x = 356,423.77

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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.