Home / 711,897.40-982,418.79-389,607.31

Finding the Fourth Proportional to 711,897.40, 982,418.79 and 389,607.31

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Solution

The fourth proportional to 711,897.40, 982,418.79 and 389,607.31 is: 537,658.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,897.40 : 982,418.79 = 389,607.31 : x
  2. Step 2: Convert to fraction form
    711,897.40/982,418.79 = 389,607.31/x
  3. Step 3: Cross multiply
    711,897.40x = 982,418.79 × 389,607.31
  4. Step 4: Simplify right side
    711,897.40x = 382,757,542,065.36
  5. Step 5: Solve for x
    x = 382,757,542,065.36/711,897.40
  6. Step 6: Final answer
    x = 537,658.29

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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.