Home / 856,712.40-1,285,905.24-715,461.36

Finding the Fourth Proportional to 856,712.40, 1,285,905.24 and 715,461.36

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Solution

The fourth proportional to 856,712.40, 1,285,905.24 and 715,461.36 is: 1,073,890.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,712.40 : 1,285,905.24 = 715,461.36 : x
  2. Step 2: Convert to fraction form
    856,712.40/1,285,905.24 = 715,461.36/x
  3. Step 3: Cross multiply
    856,712.40x = 1,285,905.24 × 715,461.36
  4. Step 4: Simplify right side
    856,712.40x = 920,015,511,841.53
  5. Step 5: Solve for x
    x = 920,015,511,841.53/856,712.40
  6. Step 6: Final answer
    x = 1,073,890.74

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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.