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Finding the Fourth Proportional to 406,779.80, 610,163.16 and 126,297.32

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Solution

The fourth proportional to 406,779.80, 610,163.16 and 126,297.32 is: 189,443.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,779.80 : 610,163.16 = 126,297.32 : x
  2. Step 2: Convert to fraction form
    406,779.80/610,163.16 = 126,297.32/x
  3. Step 3: Cross multiply
    406,779.80x = 610,163.16 × 126,297.32
  4. Step 4: Simplify right side
    406,779.80x = 77,061,971,870.73
  5. Step 5: Solve for x
    x = 77,061,971,870.73/406,779.80
  6. Step 6: Final answer
    x = 189,443.95

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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.