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Finding the Fourth Proportional to 620,999.40, 857,069.93 and 349,089.69

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Solution

The fourth proportional to 620,999.40, 857,069.93 and 349,089.69 is: 481,794.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,999.40 : 857,069.93 = 349,089.69 : x
  2. Step 2: Convert to fraction form
    620,999.40/857,069.93 = 349,089.69/x
  3. Step 3: Cross multiply
    620,999.40x = 857,069.93 × 349,089.69
  4. Step 4: Simplify right side
    620,999.40x = 299,194,277,044.75
  5. Step 5: Solve for x
    x = 299,194,277,044.75/620,999.40
  6. Step 6: Final answer
    x = 481,794.79

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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.