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Finding the Fourth Proportional to 373,356, 515,212.56 and 212,189.76

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Solution

The fourth proportional to 373,356, 515,212.56 and 212,189.76 is: 292,811.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,356 : 515,212.56 = 212,189.76 : x
  2. Step 2: Convert to fraction form
    373,356/515,212.56 = 212,189.76/x
  3. Step 3: Cross multiply
    373,356x = 515,212.56 × 212,189.76
  4. Step 4: Simplify right side
    373,356x = 109,322,829,455.39
  5. Step 5: Solve for x
    x = 109,322,829,455.39/373,356
  6. Step 6: Final answer
    x = 292,811.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.