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Finding the Fourth Proportional to 433.78, 598.68 and 247.28

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Solution

The fourth proportional to 433.78, 598.68 and 247.28 is: 341.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.78 : 598.68 = 247.28 : x
  2. Step 2: Convert to fraction form
    433.78/598.68 = 247.28/x
  3. Step 3: Cross multiply
    433.78x = 598.68 × 247.28
  4. Step 4: Simplify right side
    433.78x = 148,038.60
  5. Step 5: Solve for x
    x = 148,038.60/433.78
  6. Step 6: Final answer
    x = 341.28

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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.