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Finding the Fourth Proportional to 371, 556.46 and 319.98

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Solution

The fourth proportional to 371, 556.46 and 319.98 is: 479.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    371 : 556.46 = 319.98 : x
  2. Step 2: Convert to fraction form
    371/556.46 = 319.98/x
  3. Step 3: Cross multiply
    371x = 556.46 × 319.98
  4. Step 4: Simplify right side
    371x = 178,056.07
  5. Step 5: Solve for x
    x = 178,056.07/371
  6. Step 6: Final answer
    x = 479.94

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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.