Home / 428,766.28-643,154.86-162,455.26

Finding the Fourth Proportional to 428,766.28, 643,154.86 and 162,455.26

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Solution

The fourth proportional to 428,766.28, 643,154.86 and 162,455.26 is: 243,684.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,766.28 : 643,154.86 = 162,455.26 : x
  2. Step 2: Convert to fraction form
    428,766.28/643,154.86 = 162,455.26/x
  3. Step 3: Cross multiply
    428,766.28x = 643,154.86 × 162,455.26
  4. Step 4: Simplify right side
    428,766.28x = 104,483,890,001.56
  5. Step 5: Solve for x
    x = 104,483,890,001.56/428,766.28
  6. Step 6: Final answer
    x = 243,684.95

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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.