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Finding the Fourth Proportional to 447,218.80, 669,661.80 and 426,223.60

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Solution

The fourth proportional to 447,218.80, 669,661.80 and 426,223.60 is: 638,223.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,218.80 : 669,661.80 = 426,223.60 : x
  2. Step 2: Convert to fraction form
    447,218.80/669,661.80 = 426,223.60/x
  3. Step 3: Cross multiply
    447,218.80x = 669,661.80 × 426,223.60
  4. Step 4: Simplify right side
    447,218.80x = 285,425,663,178.48
  5. Step 5: Solve for x
    x = 285,425,663,178.48/447,218.80
  6. Step 6: Final answer
    x = 638,223.76

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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.