Home / 438,396.47-657,539.26-138,907.43

Finding the Fourth Proportional to 438,396.47, 657,539.26 and 138,907.43

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Solution

The fourth proportional to 438,396.47, 657,539.26 and 138,907.43 is: 208,343.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,396.47 : 657,539.26 = 138,907.43 : x
  2. Step 2: Convert to fraction form
    438,396.47/657,539.26 = 138,907.43/x
  3. Step 3: Cross multiply
    438,396.47x = 657,539.26 × 138,907.43
  4. Step 4: Simplify right side
    438,396.47x = 91,337,088,730.70
  5. Step 5: Solve for x
    x = 91,337,088,730.70/438,396.47
  6. Step 6: Final answer
    x = 208,343.58

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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.