Home / 428,331.17-642,356.60-200,556.27

Finding the Fourth Proportional to 428,331.17, 642,356.60 and 200,556.27

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Solution

The fourth proportional to 428,331.17, 642,356.60 and 200,556.27 is: 300,768.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,331.17 : 642,356.60 = 200,556.27 : x
  2. Step 2: Convert to fraction form
    428,331.17/642,356.60 = 200,556.27/x
  3. Step 3: Cross multiply
    428,331.17x = 642,356.60 × 200,556.27
  4. Step 4: Simplify right side
    428,331.17x = 128,828,642,703.10
  5. Step 5: Solve for x
    x = 128,828,642,703.10/428,331.17
  6. Step 6: Final answer
    x = 300,768.78

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1.5x scale

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.