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Finding the Fourth Proportional to 292,043.20, 438,064.80 and 198,731.20

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Solution

The fourth proportional to 292,043.20, 438,064.80 and 198,731.20 is: 298,096.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,043.20 : 438,064.80 = 198,731.20 : x
  2. Step 2: Convert to fraction form
    292,043.20/438,064.80 = 198,731.20/x
  3. Step 3: Cross multiply
    292,043.20x = 438,064.80 × 198,731.20
  4. Step 4: Simplify right side
    292,043.20x = 87,057,143,381.76
  5. Step 5: Solve for x
    x = 87,057,143,381.76/292,043.20
  6. Step 6: Final answer
    x = 298,096.80

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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.