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Finding the Fourth Proportional to 648.31, 972.63 and 340.08

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Solution

The fourth proportional to 648.31, 972.63 and 340.08 is: 510.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.31 : 972.63 = 340.08 : x
  2. Step 2: Convert to fraction form
    648.31/972.63 = 340.08/x
  3. Step 3: Cross multiply
    648.31x = 972.63 × 340.08
  4. Step 4: Simplify right side
    648.31x = 330,766.30
  5. Step 5: Solve for x
    x = 330,766.30/648.31
  6. Step 6: Final answer
    x = 510.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.