Home / 915,605.21-1,263,277.48-721,410.88

Finding the Fourth Proportional to 915,605.21, 1,263,277.48 and 721,410.88

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Solution

The fourth proportional to 915,605.21, 1,263,277.48 and 721,410.88 is: 995,343.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,605.21 : 1,263,277.48 = 721,410.88 : x
  2. Step 2: Convert to fraction form
    915,605.21/1,263,277.48 = 721,410.88/x
  3. Step 3: Cross multiply
    915,605.21x = 1,263,277.48 × 721,410.88
  4. Step 4: Simplify right side
    915,605.21x = 911,342,118,530.98
  5. Step 5: Solve for x
    x = 911,342,118,530.98/915,605.21
  6. Step 6: Final answer
    x = 995,343.96

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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.