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Finding the Fourth Proportional to 305,990.44, 459,165.30 and 128,483.80

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Solution

The fourth proportional to 305,990.44, 459,165.30 and 128,483.80 is: 192,801.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,990.44 : 459,165.30 = 128,483.80 : x
  2. Step 2: Convert to fraction form
    305,990.44/459,165.30 = 128,483.80/x
  3. Step 3: Cross multiply
    305,990.44x = 459,165.30 × 128,483.80
  4. Step 4: Simplify right side
    305,990.44x = 58,995,302,572.14
  5. Step 5: Solve for x
    x = 58,995,302,572.14/305,990.44
  6. Step 6: Final answer
    x = 192,801.13

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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.