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Finding the Fourth Proportional to 448.90, 619.62 and 291.76

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Solution

The fourth proportional to 448.90, 619.62 and 291.76 is: 402.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.90 : 619.62 = 291.76 : x
  2. Step 2: Convert to fraction form
    448.90/619.62 = 291.76/x
  3. Step 3: Cross multiply
    448.90x = 619.62 × 291.76
  4. Step 4: Simplify right side
    448.90x = 180,780.33
  5. Step 5: Solve for x
    x = 180,780.33/448.90
  6. Step 6: Final answer
    x = 402.72

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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.