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Finding the Third Proportional to 315 and 448.88

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Solution

The third proportional to 315 and 448.88 is: 639.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    315 : 448.88 = 448.88 : x
  2. Step 2: Convert to fraction form
    315/448.88 = 448.88/x
  3. Step 3: Cross multiply
    315x = 448.88 × 448.88
  4. Step 4: Simplify right side
    315x = 201,488.77
  5. Step 5: Solve for x
    x = 201,488.77/315
  6. Step 6: Final answer
    x = 639.65

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.