Home / 428,303.38-642,456.51-108,455.09

Finding the Fourth Proportional to 428,303.38, 642,456.51 and 108,455.09

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Solution

The fourth proportional to 428,303.38, 642,456.51 and 108,455.09 is: 162,683.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,303.38 : 642,456.51 = 108,455.09 : x
  2. Step 2: Convert to fraction form
    428,303.38/642,456.51 = 108,455.09/x
  3. Step 3: Cross multiply
    428,303.38x = 642,456.51 × 108,455.09
  4. Step 4: Simplify right side
    428,303.38x = 69,677,680,219.28
  5. Step 5: Solve for x
    x = 69,677,680,219.28/428,303.38
  6. Step 6: Final answer
    x = 162,683.00

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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.