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Finding the Fourth Proportional to 915.72, 1,373.60 and 367.76

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Solution

The fourth proportional to 915.72, 1,373.60 and 367.76 is: 551.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.72 : 1,373.60 = 367.76 : x
  2. Step 2: Convert to fraction form
    915.72/1,373.60 = 367.76/x
  3. Step 3: Cross multiply
    915.72x = 1,373.60 × 367.76
  4. Step 4: Simplify right side
    915.72x = 505,155.14
  5. Step 5: Solve for x
    x = 505,155.14/915.72
  6. Step 6: Final answer
    x = 551.65

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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.