Home / 420,312.21-629,828.74-308,066.86

Finding the Fourth Proportional to 420,312.21, 629,828.74 and 308,066.86

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Solution

The fourth proportional to 420,312.21, 629,828.74 and 308,066.86 is: 461,631.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,312.21 : 629,828.74 = 308,066.86 : x
  2. Step 2: Convert to fraction form
    420,312.21/629,828.74 = 308,066.86/x
  3. Step 3: Cross multiply
    420,312.21x = 629,828.74 × 308,066.86
  4. Step 4: Simplify right side
    420,312.21x = 194,029,362,269.56
  5. Step 5: Solve for x
    x = 194,029,362,269.56/420,312.21
  6. Step 6: Final answer
    x = 461,631.51

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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.