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Finding the Fourth Proportional to 458.30, 631.41 and 347.60

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Solution

The fourth proportional to 458.30, 631.41 and 347.60 is: 478.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.30 : 631.41 = 347.60 : x
  2. Step 2: Convert to fraction form
    458.30/631.41 = 347.60/x
  3. Step 3: Cross multiply
    458.30x = 631.41 × 347.60
  4. Step 4: Simplify right side
    458.30x = 219,478.12
  5. Step 5: Solve for x
    x = 219,478.12/458.30
  6. Step 6: Final answer
    x = 478.90

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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.