Home / 1,272,720.30-1,756,317.03-721,487.12

Finding the Fourth Proportional to 1,272,720.30, 1,756,317.03 and 721,487.12

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Solution

The fourth proportional to 1,272,720.30, 1,756,317.03 and 721,487.12 is: 995,631.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,720.30 : 1,756,317.03 = 721,487.12 : x
  2. Step 2: Convert to fraction form
    1,272,720.30/1,756,317.03 = 721,487.12/x
  3. Step 3: Cross multiply
    1,272,720.30x = 1,756,317.03 × 721,487.12
  4. Step 4: Simplify right side
    1,272,720.30x = 1,267,160,104,294.49
  5. Step 5: Solve for x
    x = 1,267,160,104,294.49/1,272,720.30
  6. Step 6: Final answer
    x = 995,631.25

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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.