Home / 428,343.60-642,516.84-108,495.36

Finding the Fourth Proportional to 428,343.60, 642,516.84 and 108,495.36

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Solution

The fourth proportional to 428,343.60, 642,516.84 and 108,495.36 is: 162,743.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,343.60 : 642,516.84 = 108,495.36 : x
  2. Step 2: Convert to fraction form
    428,343.60/642,516.84 = 108,495.36/x
  3. Step 3: Cross multiply
    428,343.60x = 642,516.84 × 108,495.36
  4. Step 4: Simplify right side
    428,343.60x = 69,710,095,861.86
  5. Step 5: Solve for x
    x = 69,710,095,861.86/428,343.60
  6. Step 6: Final answer
    x = 162,743.40

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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.