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Finding the Fourth Proportional to 454.40, 627.48 and 384.40

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Solution

The fourth proportional to 454.40, 627.48 and 384.40 is: 530.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.40 : 627.48 = 384.40 : x
  2. Step 2: Convert to fraction form
    454.40/627.48 = 384.40/x
  3. Step 3: Cross multiply
    454.40x = 627.48 × 384.40
  4. Step 4: Simplify right side
    454.40x = 241,203.31
  5. Step 5: Solve for x
    x = 241,203.31/454.40
  6. Step 6: Final answer
    x = 530.82

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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.