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Finding the Fourth Proportional to 738.85, 1,019.60 and 407.27

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Solution

The fourth proportional to 738.85, 1,019.60 and 407.27 is: 562.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.85 : 1,019.60 = 407.27 : x
  2. Step 2: Convert to fraction form
    738.85/1,019.60 = 407.27/x
  3. Step 3: Cross multiply
    738.85x = 1,019.60 × 407.27
  4. Step 4: Simplify right side
    738.85x = 415,252.49
  5. Step 5: Solve for x
    x = 415,252.49/738.85
  6. Step 6: Final answer
    x = 562.03

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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.