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Finding the Fourth Proportional to 492,069.28, 678,915.12 and 277,134.16

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Solution

The fourth proportional to 492,069.28, 678,915.12 and 277,134.16 is: 382,366.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,069.28 : 678,915.12 = 277,134.16 : x
  2. Step 2: Convert to fraction form
    492,069.28/678,915.12 = 277,134.16/x
  3. Step 3: Cross multiply
    492,069.28x = 678,915.12 × 277,134.16
  4. Step 4: Simplify right side
    492,069.28x = 188,150,571,492.50
  5. Step 5: Solve for x
    x = 188,150,571,492.50/492,069.28
  6. Step 6: Final answer
    x = 382,366.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.