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Finding the Fourth Proportional to 1,065,808.63, 1,595,848.15 and 811,879.48

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Solution

The fourth proportional to 1,065,808.63, 1,595,848.15 and 811,879.48 is: 1,215,636.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065,808.63 : 1,595,848.15 = 811,879.48 : x
  2. Step 2: Convert to fraction form
    1,065,808.63/1,595,848.15 = 811,879.48/x
  3. Step 3: Cross multiply
    1,065,808.63x = 1,595,848.15 × 811,879.48
  4. Step 4: Simplify right side
    1,065,808.63x = 1,295,636,366,180.96
  5. Step 5: Solve for x
    x = 1,295,636,366,180.96/1,065,808.63
  6. Step 6: Final answer
    x = 1,215,636.96

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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.