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Finding the Fourth Proportional to 292,240.45, 438,365.01 and 81,865.09

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Solution

The fourth proportional to 292,240.45, 438,365.01 and 81,865.09 is: 122,798.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,240.45 : 438,365.01 = 81,865.09 : x
  2. Step 2: Convert to fraction form
    292,240.45/438,365.01 = 81,865.09/x
  3. Step 3: Cross multiply
    292,240.45x = 438,365.01 × 81,865.09
  4. Step 4: Simplify right side
    292,240.45x = 35,886,790,996.50
  5. Step 5: Solve for x
    x = 35,886,790,996.50/292,240.45
  6. Step 6: Final answer
    x = 122,798.85

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1.5x scale

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.