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Finding the Fourth Proportional to 448.70, 619.33 and 315.95

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Solution

The fourth proportional to 448.70, 619.33 and 315.95 is: 436.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.70 : 619.33 = 315.95 : x
  2. Step 2: Convert to fraction form
    448.70/619.33 = 315.95/x
  3. Step 3: Cross multiply
    448.70x = 619.33 × 315.95
  4. Step 4: Simplify right side
    448.70x = 195,677.31
  5. Step 5: Solve for x
    x = 195,677.31/448.70
  6. Step 6: Final answer
    x = 436.10

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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.