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Finding the Fourth Proportional to 644,702.10, 966,712.95 and 218,091.30

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Solution

The fourth proportional to 644,702.10, 966,712.95 and 218,091.30 is: 327,021.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,702.10 : 966,712.95 = 218,091.30 : x
  2. Step 2: Convert to fraction form
    644,702.10/966,712.95 = 218,091.30/x
  3. Step 3: Cross multiply
    644,702.10x = 966,712.95 × 218,091.30
  4. Step 4: Simplify right side
    644,702.10x = 210,831,683,992.34
  5. Step 5: Solve for x
    x = 210,831,683,992.34/644,702.10
  6. Step 6: Final answer
    x = 327,021.87

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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.