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Finding the Fourth Proportional to 1,049.89, 1,575.15 and 319.45

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Solution

The fourth proportional to 1,049.89, 1,575.15 and 319.45 is: 479.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,049.89 : 1,575.15 = 319.45 : x
  2. Step 2: Convert to fraction form
    1,049.89/1,575.15 = 319.45/x
  3. Step 3: Cross multiply
    1,049.89x = 1,575.15 × 319.45
  4. Step 4: Simplify right side
    1,049.89x = 503,181.67
  5. Step 5: Solve for x
    x = 503,181.67/1,049.89
  6. Step 6: Final answer
    x = 479.27

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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.