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Finding the Fourth Proportional to 403,915.70, 605,873.55 and 262,910.90

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Solution

The fourth proportional to 403,915.70, 605,873.55 and 262,910.90 is: 394,366.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,915.70 : 605,873.55 = 262,910.90 : x
  2. Step 2: Convert to fraction form
    403,915.70/605,873.55 = 262,910.90/x
  3. Step 3: Cross multiply
    403,915.70x = 605,873.55 × 262,910.90
  4. Step 4: Simplify right side
    403,915.70x = 159,290,760,316.70
  5. Step 5: Solve for x
    x = 159,290,760,316.70/403,915.70
  6. Step 6: Final answer
    x = 394,366.35

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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.