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Finding the Fourth Proportional to 455.52, 628.80 and 345.02

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Solution

The fourth proportional to 455.52, 628.80 and 345.02 is: 476.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.52 : 628.80 = 345.02 : x
  2. Step 2: Convert to fraction form
    455.52/628.80 = 345.02/x
  3. Step 3: Cross multiply
    455.52x = 628.80 × 345.02
  4. Step 4: Simplify right side
    455.52x = 216,948.58
  5. Step 5: Solve for x
    x = 216,948.58/455.52
  6. Step 6: Final answer
    x = 476.27

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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.