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Finding the Fourth Proportional to 348,066.20, 521,321.70 and 285,858.20

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Solution

The fourth proportional to 348,066.20, 521,321.70 and 285,858.20 is: 428,148.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,066.20 : 521,321.70 = 285,858.20 : x
  2. Step 2: Convert to fraction form
    348,066.20/521,321.70 = 285,858.20/x
  3. Step 3: Cross multiply
    348,066.20x = 521,321.70 × 285,858.20
  4. Step 4: Simplify right side
    348,066.20x = 149,024,082,782.94
  5. Step 5: Solve for x
    x = 149,024,082,782.94/348,066.20
  6. Step 6: Final answer
    x = 428,148.68

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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.