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Finding the Fourth Proportional to 448.40, 671.90 and 253.16

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Solution

The fourth proportional to 448.40, 671.90 and 253.16 is: 379.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.40 : 671.90 = 253.16 : x
  2. Step 2: Convert to fraction form
    448.40/671.90 = 253.16/x
  3. Step 3: Cross multiply
    448.40x = 671.90 × 253.16
  4. Step 4: Simplify right side
    448.40x = 170,096.10
  5. Step 5: Solve for x
    x = 170,096.10/448.40
  6. Step 6: Final answer
    x = 379.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.