Home / 428,445.41-642,723.39-144,013.30

Finding the Fourth Proportional to 428,445.41, 642,723.39 and 144,013.30

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Solution

The fourth proportional to 428,445.41, 642,723.39 and 144,013.30 is: 216,038.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,445.41 : 642,723.39 = 144,013.30 : x
  2. Step 2: Convert to fraction form
    428,445.41/642,723.39 = 144,013.30/x
  3. Step 3: Cross multiply
    428,445.41x = 642,723.39 × 144,013.30
  4. Step 4: Simplify right side
    428,445.41x = 92,560,714,774.28
  5. Step 5: Solve for x
    x = 92,560,714,774.28/428,445.41
  6. Step 6: Final answer
    x = 216,038.53

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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.