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Finding the Fourth Proportional to 315,635.51, 435,576.98 and 172,395.89

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Solution

The fourth proportional to 315,635.51, 435,576.98 and 172,395.89 is: 237,906.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,635.51 : 435,576.98 = 172,395.89 : x
  2. Step 2: Convert to fraction form
    315,635.51/435,576.98 = 172,395.89/x
  3. Step 3: Cross multiply
    315,635.51x = 435,576.98 × 172,395.89
  4. Step 4: Simplify right side
    315,635.51x = 75,091,678,090.75
  5. Step 5: Solve for x
    x = 75,091,678,090.75/315,635.51
  6. Step 6: Final answer
    x = 237,906.31

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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.