Home / 428,256.32-642,675.16-228,719.90

Finding the Fourth Proportional to 428,256.32, 642,675.16 and 228,719.90

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Solution

The fourth proportional to 428,256.32, 642,675.16 and 228,719.90 is: 343,235.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,256.32 : 642,675.16 = 228,719.90 : x
  2. Step 2: Convert to fraction form
    428,256.32/642,675.16 = 228,719.90/x
  3. Step 3: Cross multiply
    428,256.32x = 642,675.16 × 228,719.90
  4. Step 4: Simplify right side
    428,256.32x = 146,992,600,220.27
  5. Step 5: Solve for x
    x = 146,992,600,220.27/428,256.32
  6. Step 6: Final answer
    x = 343,235.10

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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.