Home / 427,226.40-640,278.98-314,378.21

Finding the Fourth Proportional to 427,226.40, 640,278.98 and 314,378.21

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Solution

The fourth proportional to 427,226.40, 640,278.98 and 314,378.21 is: 471,154.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,226.40 : 640,278.98 = 314,378.21 : x
  2. Step 2: Convert to fraction form
    427,226.40/640,278.98 = 314,378.21/x
  3. Step 3: Cross multiply
    427,226.40x = 640,278.98 × 314,378.21
  4. Step 4: Simplify right side
    427,226.40x = 201,289,760,840.75
  5. Step 5: Solve for x
    x = 201,289,760,840.75/427,226.40
  6. Step 6: Final answer
    x = 471,154.78

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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.