Home / 428,103.30-642,184.95-171,935.90

Finding the Fourth Proportional to 428,103.30, 642,184.95 and 171,935.90

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Solution

The fourth proportional to 428,103.30, 642,184.95 and 171,935.90 is: 257,915.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,103.30 : 642,184.95 = 171,935.90 : x
  2. Step 2: Convert to fraction form
    428,103.30/642,184.95 = 171,935.90/x
  3. Step 3: Cross multiply
    428,103.30x = 642,184.95 × 171,935.90
  4. Step 4: Simplify right side
    428,103.30x = 110,414,644,133.78
  5. Step 5: Solve for x
    x = 110,414,644,133.78/428,103.30
  6. Step 6: Final answer
    x = 257,915.89

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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.