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Finding the Fourth Proportional to 306,369.90, 459,274.68 and 128,889.42

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Solution

The fourth proportional to 306,369.90, 459,274.68 and 128,889.42 is: 193,216.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,369.90 : 459,274.68 = 128,889.42 : x
  2. Step 2: Convert to fraction form
    306,369.90/459,274.68 = 128,889.42/x
  3. Step 3: Cross multiply
    306,369.90x = 459,274.68 × 128,889.42
  4. Step 4: Simplify right side
    306,369.90x = 59,195,647,125.89
  5. Step 5: Solve for x
    x = 59,195,647,125.89/306,369.90
  6. Step 6: Final answer
    x = 193,216.26

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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.