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Finding the Fourth Proportional to 425,421.20, 638,131.80 and 414,923.60

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Solution

The fourth proportional to 425,421.20, 638,131.80 and 414,923.60 is: 622,385.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,421.20 : 638,131.80 = 414,923.60 : x
  2. Step 2: Convert to fraction form
    425,421.20/638,131.80 = 414,923.60/x
  3. Step 3: Cross multiply
    425,421.20x = 638,131.80 × 414,923.60
  4. Step 4: Simplify right side
    425,421.20x = 264,775,943,730.48
  5. Step 5: Solve for x
    x = 264,775,943,730.48/425,421.20
  6. Step 6: Final answer
    x = 622,385.40

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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.