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Finding the Fourth Proportional to 315,762.67, 435,747.40 and 172,519.65

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Solution

The fourth proportional to 315,762.67, 435,747.40 and 172,519.65 is: 238,074.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,762.67 : 435,747.40 = 172,519.65 : x
  2. Step 2: Convert to fraction form
    315,762.67/435,747.40 = 172,519.65/x
  3. Step 3: Cross multiply
    315,762.67x = 435,747.40 × 172,519.65
  4. Step 4: Simplify right side
    315,762.67x = 75,174,988,936.41
  5. Step 5: Solve for x
    x = 75,174,988,936.41/315,762.67
  6. Step 6: Final answer
    x = 238,074.34

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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.