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Finding the Fourth Proportional to 912.42, 1,368.56 and 357.14

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Solution

The fourth proportional to 912.42, 1,368.56 and 357.14 is: 535.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.42 : 1,368.56 = 357.14 : x
  2. Step 2: Convert to fraction form
    912.42/1,368.56 = 357.14/x
  3. Step 3: Cross multiply
    912.42x = 1,368.56 × 357.14
  4. Step 4: Simplify right side
    912.42x = 488,758.89
  5. Step 5: Solve for x
    x = 488,758.89/912.42
  6. Step 6: Final answer
    x = 535.67

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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.