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Finding the Fourth Proportional to 251,137.40, 377,580.90 and 212,646.20

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Solution

The fourth proportional to 251,137.40, 377,580.90 and 212,646.20 is: 319,710.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,137.40 : 377,580.90 = 212,646.20 : x
  2. Step 2: Convert to fraction form
    251,137.40/377,580.90 = 212,646.20/x
  3. Step 3: Cross multiply
    251,137.40x = 377,580.90 × 212,646.20
  4. Step 4: Simplify right side
    251,137.40x = 80,291,143,577.58
  5. Step 5: Solve for x
    x = 80,291,143,577.58/251,137.40
  6. Step 6: Final answer
    x = 319,710.02

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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.