Home / 428,733.30-642,905.55-162,405.30

Finding the Fourth Proportional to 428,733.30, 642,905.55 and 162,405.30

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Solution

The fourth proportional to 428,733.30, 642,905.55 and 162,405.30 is: 243,534.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,733.30 : 642,905.55 = 162,405.30 : x
  2. Step 2: Convert to fraction form
    428,733.30/642,905.55 = 162,405.30/x
  3. Step 3: Cross multiply
    428,733.30x = 642,905.55 × 162,405.30
  4. Step 4: Simplify right side
    428,733.30x = 104,411,268,719.42
  5. Step 5: Solve for x
    x = 104,411,268,719.42/428,733.30
  6. Step 6: Final answer
    x = 243,534.31

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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.