Home / 428,992.08-643,488.90-176,096.31

Finding the Fourth Proportional to 428,992.08, 643,488.90 and 176,096.31

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Solution

The fourth proportional to 428,992.08, 643,488.90 and 176,096.31 is: 264,144.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,992.08 : 643,488.90 = 176,096.31 : x
  2. Step 2: Convert to fraction form
    428,992.08/643,488.90 = 176,096.31/x
  3. Step 3: Cross multiply
    428,992.08x = 643,488.90 × 176,096.31
  4. Step 4: Simplify right side
    428,992.08x = 113,316,020,815.96
  5. Step 5: Solve for x
    x = 113,316,020,815.96/428,992.08
  6. Step 6: Final answer
    x = 264,144.79

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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.