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Finding the Fourth Proportional to 306,660, 459,990 and 85,044

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Solution

The fourth proportional to 306,660, 459,990 and 85,044 is: 127,566

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,660 : 459,990 = 85,044 : x
  2. Step 2: Convert to fraction form
    306,660/459,990 = 85,044/x
  3. Step 3: Cross multiply
    306,660x = 459,990 × 85,044
  4. Step 4: Simplify right side
    306,660x = 39,119,389,560
  5. Step 5: Solve for x
    x = 39,119,389,560/306,660
  6. Step 6: Final answer
    x = 127,566

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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.