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Finding the Fourth Proportional to 920,599, 1,380,915.78 and 255,768.28

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Solution

The fourth proportional to 920,599, 1,380,915.78 and 255,768.28 is: 383,657.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,599 : 1,380,915.78 = 255,768.28 : x
  2. Step 2: Convert to fraction form
    920,599/1,380,915.78 = 255,768.28/x
  3. Step 3: Cross multiply
    920,599x = 1,380,915.78 × 255,768.28
  4. Step 4: Simplify right side
    920,599x = 353,194,453,875.46
  5. Step 5: Solve for x
    x = 353,194,453,875.46/920,599
  6. Step 6: Final answer
    x = 383,657.22

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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.