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Finding the Fourth Proportional to 736, 1,015 and 456.20

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Solution

The fourth proportional to 736, 1,015 and 456.20 is: 629.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    736 : 1,015 = 456.20 : x
  2. Step 2: Convert to fraction form
    736/1,015 = 456.20/x
  3. Step 3: Cross multiply
    736x = 1,015 × 456.20
  4. Step 4: Simplify right side
    736x = 463,043
  5. Step 5: Solve for x
    x = 463,043/736
  6. Step 6: Final answer
    x = 629.13

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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.