Home / 427,217.96-640,266.37-314,369.78

Finding the Fourth Proportional to 427,217.96, 640,266.37 and 314,369.78

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Solution

The fourth proportional to 427,217.96, 640,266.37 and 314,369.78 is: 471,142.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,217.96 : 640,266.37 = 314,369.78 : x
  2. Step 2: Convert to fraction form
    427,217.96/640,266.37 = 314,369.78/x
  3. Step 3: Cross multiply
    427,217.96x = 640,266.37 × 314,369.78
  4. Step 4: Simplify right side
    427,217.96x = 201,280,395,659.37
  5. Step 5: Solve for x
    x = 201,280,395,659.37/427,217.96
  6. Step 6: Final answer
    x = 471,142.16

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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.