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Finding the Fourth Proportional to 346,418.60, 519,627.90 and 212,865.80

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Solution

The fourth proportional to 346,418.60, 519,627.90 and 212,865.80 is: 319,298.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,418.60 : 519,627.90 = 212,865.80 : x
  2. Step 2: Convert to fraction form
    346,418.60/519,627.90 = 212,865.80/x
  3. Step 3: Cross multiply
    346,418.60x = 519,627.90 × 212,865.80
  4. Step 4: Simplify right side
    346,418.60x = 110,611,008,635.82
  5. Step 5: Solve for x
    x = 110,611,008,635.82/346,418.60
  6. Step 6: Final answer
    x = 319,298.70

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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.