Home / 428,745.44-643,111.93-104,534.84

Finding the Fourth Proportional to 428,745.44, 643,111.93 and 104,534.84

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Solution

The fourth proportional to 428,745.44, 643,111.93 and 104,534.84 is: 156,800.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,745.44 : 643,111.93 = 104,534.84 : x
  2. Step 2: Convert to fraction form
    428,745.44/643,111.93 = 104,534.84/x
  3. Step 3: Cross multiply
    428,745.44x = 643,111.93 × 104,534.84
  4. Step 4: Simplify right side
    428,745.44x = 67,227,602,704.64
  5. Step 5: Solve for x
    x = 67,227,602,704.64/428,745.44
  6. Step 6: Final answer
    x = 156,800.74

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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.