Home / 711,454.28-982,137.78-420,974.52

Finding the Fourth Proportional to 711,454.28, 982,137.78 and 420,974.52

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Solution

The fourth proportional to 711,454.28, 982,137.78 and 420,974.52 is: 581,140.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,454.28 : 982,137.78 = 420,974.52 : x
  2. Step 2: Convert to fraction form
    711,454.28/982,137.78 = 420,974.52/x
  3. Step 3: Cross multiply
    711,454.28x = 982,137.78 × 420,974.52
  4. Step 4: Simplify right side
    711,454.28x = 413,454,980,509.37
  5. Step 5: Solve for x
    x = 413,454,980,509.37/711,454.28
  6. Step 6: Final answer
    x = 581,140.62

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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.