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Finding the Fourth Proportional to 428,401.00, 642,691.71 and 162,155.62

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Solution

The fourth proportional to 428,401.00, 642,691.71 and 162,155.62 is: 243,267.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,401.00 : 642,691.71 = 162,155.62 : x
  2. Step 2: Convert to fraction form
    428,401.00/642,691.71 = 162,155.62/x
  3. Step 3: Cross multiply
    428,401.00x = 642,691.71 × 162,155.62
  4. Step 4: Simplify right side
    428,401.00x = 104,216,068,679.67
  5. Step 5: Solve for x
    x = 104,216,068,679.67/428,401.00
  6. Step 6: Final answer
    x = 243,267.57

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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.