Home / 438,886.08-658,351.80-139,390.20

Finding the Fourth Proportional to 438,886.08, 658,351.80 and 139,390.20

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Solution

The fourth proportional to 438,886.08, 658,351.80 and 139,390.20 is: 209,092.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,886.08 : 658,351.80 = 139,390.20 : x
  2. Step 2: Convert to fraction form
    438,886.08/658,351.80 = 139,390.20/x
  3. Step 3: Cross multiply
    438,886.08x = 658,351.80 × 139,390.20
  4. Step 4: Simplify right side
    438,886.08x = 91,767,789,072.36
  5. Step 5: Solve for x
    x = 91,767,789,072.36/438,886.08
  6. Step 6: Final answer
    x = 209,092.50

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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.