Home / 428,101.80-642,182.69-171,934.39

Finding the Fourth Proportional to 428,101.80, 642,182.69 and 171,934.39

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Solution

The fourth proportional to 428,101.80, 642,182.69 and 171,934.39 is: 257,913.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,101.80 : 642,182.69 = 171,934.39 : x
  2. Step 2: Convert to fraction form
    428,101.80/642,182.69 = 171,934.39/x
  3. Step 3: Cross multiply
    428,101.80x = 642,182.69 × 171,934.39
  4. Step 4: Simplify right side
    428,101.80x = 110,413,291,510.37
  5. Step 5: Solve for x
    x = 110,413,291,510.37/428,101.80
  6. Step 6: Final answer
    x = 257,913.63

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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.