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Finding the Fourth Proportional to 451.55, 623.18 and 346.79

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Solution

The fourth proportional to 451.55, 623.18 and 346.79 is: 478.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.55 : 623.18 = 346.79 : x
  2. Step 2: Convert to fraction form
    451.55/623.18 = 346.79/x
  3. Step 3: Cross multiply
    451.55x = 623.18 × 346.79
  4. Step 4: Simplify right side
    451.55x = 216,112.59
  5. Step 5: Solve for x
    x = 216,112.59/451.55
  6. Step 6: Final answer
    x = 478.60

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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.