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Finding the Fourth Proportional to 351,693.80, 527,438.30 and 127,028.20

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Solution

The fourth proportional to 351,693.80, 527,438.30 and 127,028.20 is: 190,505.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,693.80 : 527,438.30 = 127,028.20 : x
  2. Step 2: Convert to fraction form
    351,693.80/527,438.30 = 127,028.20/x
  3. Step 3: Cross multiply
    351,693.80x = 527,438.30 × 127,028.20
  4. Step 4: Simplify right side
    351,693.80x = 66,999,537,860.06
  5. Step 5: Solve for x
    x = 66,999,537,860.06/351,693.80
  6. Step 6: Final answer
    x = 190,505.31

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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.