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Finding the Fourth Proportional to 748.42, 1,032.79 and 433.67

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Solution

The fourth proportional to 748.42, 1,032.79 and 433.67 is: 598.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.42 : 1,032.79 = 433.67 : x
  2. Step 2: Convert to fraction form
    748.42/1,032.79 = 433.67/x
  3. Step 3: Cross multiply
    748.42x = 1,032.79 × 433.67
  4. Step 4: Simplify right side
    748.42x = 447,890.04
  5. Step 5: Solve for x
    x = 447,890.04/748.42
  6. Step 6: Final answer
    x = 598.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.