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Finding the Fourth Proportional to 513.64, 710.68 and 448.28

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Solution

The fourth proportional to 513.64, 710.68 and 448.28 is: 620.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.64 : 710.68 = 448.28 : x
  2. Step 2: Convert to fraction form
    513.64/710.68 = 448.28/x
  3. Step 3: Cross multiply
    513.64x = 710.68 × 448.28
  4. Step 4: Simplify right side
    513.64x = 318,583.63
  5. Step 5: Solve for x
    x = 318,583.63/513.64
  6. Step 6: Final answer
    x = 620.25

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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.