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Finding the Fourth Proportional to 612,164.76, 917,721.22 and 212,753.64

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Solution

The fourth proportional to 612,164.76, 917,721.22 and 212,753.64 is: 318,947.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,164.76 : 917,721.22 = 212,753.64 : x
  2. Step 2: Convert to fraction form
    612,164.76/917,721.22 = 212,753.64/x
  3. Step 3: Cross multiply
    612,164.76x = 917,721.22 × 212,753.64
  4. Step 4: Simplify right side
    612,164.76x = 195,248,530,060.24
  5. Step 5: Solve for x
    x = 195,248,530,060.24/612,164.76
  6. Step 6: Final answer
    x = 318,947.68

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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.