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Finding the Fourth Proportional to 647.83, 971.34 and 300.70

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Solution

The fourth proportional to 647.83, 971.34 and 300.70 is: 450.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.83 : 971.34 = 300.70 : x
  2. Step 2: Convert to fraction form
    647.83/971.34 = 300.70/x
  3. Step 3: Cross multiply
    647.83x = 971.34 × 300.70
  4. Step 4: Simplify right side
    647.83x = 292,082.02
  5. Step 5: Solve for x
    x = 292,082.02/647.83
  6. Step 6: Final answer
    x = 450.86

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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.