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Finding the Fourth Proportional to 345,371.99, 518,411.34 and 285,208.83

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Solution

The fourth proportional to 345,371.99, 518,411.34 and 285,208.83 is: 428,105.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,371.99 : 518,411.34 = 285,208.83 : x
  2. Step 2: Convert to fraction form
    345,371.99/518,411.34 = 285,208.83/x
  3. Step 3: Cross multiply
    345,371.99x = 518,411.34 × 285,208.83
  4. Step 4: Simplify right side
    345,371.99x = 147,855,491,740.13
  5. Step 5: Solve for x
    x = 147,855,491,740.13/345,371.99
  6. Step 6: Final answer
    x = 428,105.05

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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.