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Finding the Fourth Proportional to 288,085.30, 431,577.15 and 154,921.30

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Solution

The fourth proportional to 288,085.30, 431,577.15 and 154,921.30 is: 232,085.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,085.30 : 431,577.15 = 154,921.30 : x
  2. Step 2: Convert to fraction form
    288,085.30/431,577.15 = 154,921.30/x
  3. Step 3: Cross multiply
    288,085.30x = 431,577.15 × 154,921.30
  4. Step 4: Simplify right side
    288,085.30x = 66,860,493,128.30
  5. Step 5: Solve for x
    x = 66,860,493,128.30/288,085.30
  6. Step 6: Final answer
    x = 232,085.75

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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.