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Finding the Fourth Proportional to 647.02, 970.19 and 281.64

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Solution

The fourth proportional to 647.02, 970.19 and 281.64 is: 422.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.02 : 970.19 = 281.64 : x
  2. Step 2: Convert to fraction form
    647.02/970.19 = 281.64/x
  3. Step 3: Cross multiply
    647.02x = 970.19 × 281.64
  4. Step 4: Simplify right side
    647.02x = 273,244.31
  5. Step 5: Solve for x
    x = 273,244.31/647.02
  6. Step 6: Final answer
    x = 422.31

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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.