Home / 457,749.20-687,239.40-268,403.60

Finding the Fourth Proportional to 457,749.20, 687,239.40 and 268,403.60

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Solution

The fourth proportional to 457,749.20, 687,239.40 and 268,403.60 is: 402,966.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,749.20 : 687,239.40 = 268,403.60 : x
  2. Step 2: Convert to fraction form
    457,749.20/687,239.40 = 268,403.60/x
  3. Step 3: Cross multiply
    457,749.20x = 687,239.40 × 268,403.60
  4. Step 4: Simplify right side
    457,749.20x = 184,457,529,021.84
  5. Step 5: Solve for x
    x = 184,457,529,021.84/457,749.20
  6. Step 6: Final answer
    x = 402,966.36

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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.