Home / 428,577.06-642,741.66-144,236.28

Finding the Fourth Proportional to 428,577.06, 642,741.66 and 144,236.28

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Solution

The fourth proportional to 428,577.06, 642,741.66 and 144,236.28 is: 216,312.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,577.06 : 642,741.66 = 144,236.28 : x
  2. Step 2: Convert to fraction form
    428,577.06/642,741.66 = 144,236.28/x
  3. Step 3: Cross multiply
    428,577.06x = 642,741.66 × 144,236.28
  4. Step 4: Simplify right side
    428,577.06x = 92,706,666,039.42
  5. Step 5: Solve for x
    x = 92,706,666,039.42/428,577.06
  6. Step 6: Final answer
    x = 216,312.71

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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.