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Finding the Fourth Proportional to 256,626.63, 384,915.18 and 79,085.97

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Solution

The fourth proportional to 256,626.63, 384,915.18 and 79,085.97 is: 118,621.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,626.63 : 384,915.18 = 79,085.97 : x
  2. Step 2: Convert to fraction form
    256,626.63/384,915.18 = 79,085.97/x
  3. Step 3: Cross multiply
    256,626.63x = 384,915.18 × 79,085.97
  4. Step 4: Simplify right side
    256,626.63x = 30,441,390,378.02
  5. Step 5: Solve for x
    x = 30,441,390,378.02/256,626.63
  6. Step 6: Final answer
    x = 118,621.32

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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.