Home / 438,566.80-658,109.40-319,939.60

Finding the Fourth Proportional to 438,566.80, 658,109.40 and 319,939.60

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Solution

The fourth proportional to 438,566.80, 658,109.40 and 319,939.60 is: 480,098.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,566.80 : 658,109.40 = 319,939.60 : x
  2. Step 2: Convert to fraction form
    438,566.80/658,109.40 = 319,939.60/x
  3. Step 3: Cross multiply
    438,566.80x = 658,109.40 × 319,939.60
  4. Step 4: Simplify right side
    438,566.80x = 210,555,258,192.24
  5. Step 5: Solve for x
    x = 210,555,258,192.24/438,566.80
  6. Step 6: Final answer
    x = 480,098.49

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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.