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Finding the Fourth Proportional to 454.65, 627.47 and 288.87

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Solution

The fourth proportional to 454.65, 627.47 and 288.87 is: 398.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.65 : 627.47 = 288.87 : x
  2. Step 2: Convert to fraction form
    454.65/627.47 = 288.87/x
  3. Step 3: Cross multiply
    454.65x = 627.47 × 288.87
  4. Step 4: Simplify right side
    454.65x = 181,257.26
  5. Step 5: Solve for x
    x = 181,257.26/454.65
  6. Step 6: Final answer
    x = 398.67

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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.