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Finding the Fourth Proportional to 612,031.44, 917,671.28 and 212,500.56

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Solution

The fourth proportional to 612,031.44, 917,671.28 and 212,500.56 is: 318,620.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,031.44 : 917,671.28 = 212,500.56 : x
  2. Step 2: Convert to fraction form
    612,031.44/917,671.28 = 212,500.56/x
  3. Step 3: Cross multiply
    612,031.44x = 917,671.28 × 212,500.56
  4. Step 4: Simplify right side
    612,031.44x = 195,005,660,895.92
  5. Step 5: Solve for x
    x = 195,005,660,895.92/612,031.44
  6. Step 6: Final answer
    x = 318,620.33

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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.