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Finding the Fourth Proportional to 451,990.72, 677,953.05 and 212,159.26

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Solution

The fourth proportional to 451,990.72, 677,953.05 and 212,159.26 is: 318,223.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,990.72 : 677,953.05 = 212,159.26 : x
  2. Step 2: Convert to fraction form
    451,990.72/677,953.05 = 212,159.26/x
  3. Step 3: Cross multiply
    451,990.72x = 677,953.05 × 212,159.26
  4. Step 4: Simplify right side
    451,990.72x = 143,834,017,402.74
  5. Step 5: Solve for x
    x = 143,834,017,402.74/451,990.72
  6. Step 6: Final answer
    x = 318,223.39

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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.