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Finding the Fourth Proportional to 309,167.33, 426,437.48 and 217,481.00

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Solution

The fourth proportional to 309,167.33, 426,437.48 and 217,481.00 is: 299,973.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,167.33 : 426,437.48 = 217,481.00 : x
  2. Step 2: Convert to fraction form
    309,167.33/426,437.48 = 217,481.00/x
  3. Step 3: Cross multiply
    309,167.33x = 426,437.48 × 217,481.00
  4. Step 4: Simplify right side
    309,167.33x = 92,742,047,999.40
  5. Step 5: Solve for x
    x = 92,742,047,999.40/309,167.33
  6. Step 6: Final answer
    x = 299,973.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.