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Finding the Fourth Proportional to 306,936.16, 460,443.12 and 85,320.16

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Solution

The fourth proportional to 306,936.16, 460,443.12 and 85,320.16 is: 127,991.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,936.16 : 460,443.12 = 85,320.16 : x
  2. Step 2: Convert to fraction form
    306,936.16/460,443.12 = 85,320.16/x
  3. Step 3: Cross multiply
    306,936.16x = 460,443.12 × 85,320.16
  4. Step 4: Simplify right side
    306,936.16x = 39,285,080,669.30
  5. Step 5: Solve for x
    x = 39,285,080,669.30/306,936.16
  6. Step 6: Final answer
    x = 127,991.05

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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.