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Finding the Fourth Proportional to 426,391.74, 639,921.90 and 297,469.68

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Solution

The fourth proportional to 426,391.74, 639,921.90 and 297,469.68 is: 446,437.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,391.74 : 639,921.90 = 297,469.68 : x
  2. Step 2: Convert to fraction form
    426,391.74/639,921.90 = 297,469.68/x
  3. Step 3: Cross multiply
    426,391.74x = 639,921.90 × 297,469.68
  4. Step 4: Simplify right side
    426,391.74x = 190,357,362,817.99
  5. Step 5: Solve for x
    x = 190,357,362,817.99/426,391.74
  6. Step 6: Final answer
    x = 446,437.74

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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.