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Finding the Fourth Proportional to 647.52, 972.22 and 405.04

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Solution

The fourth proportional to 647.52, 972.22 and 405.04 is: 608.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.52 : 972.22 = 405.04 : x
  2. Step 2: Convert to fraction form
    647.52/972.22 = 405.04/x
  3. Step 3: Cross multiply
    647.52x = 972.22 × 405.04
  4. Step 4: Simplify right side
    647.52x = 393,787.99
  5. Step 5: Solve for x
    x = 393,787.99/647.52
  6. Step 6: Final answer
    x = 608.15

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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.