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Finding the Fourth Proportional to 420,074.40, 630,111.60 and 414,544.80

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Solution

The fourth proportional to 420,074.40, 630,111.60 and 414,544.80 is: 621,817.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,074.40 : 630,111.60 = 414,544.80 : x
  2. Step 2: Convert to fraction form
    420,074.40/630,111.60 = 414,544.80/x
  3. Step 3: Cross multiply
    420,074.40x = 630,111.60 × 414,544.80
  4. Step 4: Simplify right side
    420,074.40x = 261,209,487,199.68
  5. Step 5: Solve for x
    x = 261,209,487,199.68/420,074.40
  6. Step 6: Final answer
    x = 621,817.20

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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.