Home / 426,822.80-640,234.20-214,246.40

Finding the Fourth Proportional to 426,822.80, 640,234.20 and 214,246.40

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Solution

The fourth proportional to 426,822.80, 640,234.20 and 214,246.40 is: 321,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,822.80 : 640,234.20 = 214,246.40 : x
  2. Step 2: Convert to fraction form
    426,822.80/640,234.20 = 214,246.40/x
  3. Step 3: Cross multiply
    426,822.80x = 640,234.20 × 214,246.40
  4. Step 4: Simplify right side
    426,822.80x = 137,167,872,506.88
  5. Step 5: Solve for x
    x = 137,167,872,506.88/426,822.80
  6. Step 6: Final answer
    x = 321,369.60

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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.