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Finding the Fourth Proportional to 319,064.86, 440,303.80 and 173,871.90

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Solution

The fourth proportional to 319,064.86, 440,303.80 and 173,871.90 is: 239,940.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,064.86 : 440,303.80 = 173,871.90 : x
  2. Step 2: Convert to fraction form
    319,064.86/440,303.80 = 173,871.90/x
  3. Step 3: Cross multiply
    319,064.86x = 440,303.80 × 173,871.90
  4. Step 4: Simplify right side
    319,064.86x = 76,556,458,174.55
  5. Step 5: Solve for x
    x = 76,556,458,174.55/319,064.86
  6. Step 6: Final answer
    x = 239,940.12

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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.