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Finding the Fourth Proportional to 292,021.80, 438,032.70 and 198,018.60

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Solution

The fourth proportional to 292,021.80, 438,032.70 and 198,018.60 is: 297,027.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,021.80 : 438,032.70 = 198,018.60 : x
  2. Step 2: Convert to fraction form
    292,021.80/438,032.70 = 198,018.60/x
  3. Step 3: Cross multiply
    292,021.80x = 438,032.70 × 198,018.60
  4. Step 4: Simplify right side
    292,021.80x = 86,738,622,008.22
  5. Step 5: Solve for x
    x = 86,738,622,008.22/292,021.80
  6. Step 6: Final answer
    x = 297,027.90

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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.