Home / 282,749.94-389,905.65-187,221.78

Finding the Fourth Proportional to 282,749.94, 389,905.65 and 187,221.78

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Solution

The fourth proportional to 282,749.94, 389,905.65 and 187,221.78 is: 258,174.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,749.94 : 389,905.65 = 187,221.78 : x
  2. Step 2: Convert to fraction form
    282,749.94/389,905.65 = 187,221.78/x
  3. Step 3: Cross multiply
    282,749.94x = 389,905.65 × 187,221.78
  4. Step 4: Simplify right side
    282,749.94x = 72,998,829,825.06
  5. Step 5: Solve for x
    x = 72,998,829,825.06/282,749.94
  6. Step 6: Final answer
    x = 258,174.52

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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.