Home / 428,630.16-642,857.40-162,298.80

Finding the Fourth Proportional to 428,630.16, 642,857.40 and 162,298.80

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Solution

The fourth proportional to 428,630.16, 642,857.40 and 162,298.80 is: 243,414.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,630.16 : 642,857.40 = 162,298.80 : x
  2. Step 2: Convert to fraction form
    428,630.16/642,857.40 = 162,298.80/x
  3. Step 3: Cross multiply
    428,630.16x = 642,857.40 × 162,298.80
  4. Step 4: Simplify right side
    428,630.16x = 104,334,984,591.12
  5. Step 5: Solve for x
    x = 104,334,984,591.12/428,630.16
  6. Step 6: Final answer
    x = 243,414.94

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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.