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Finding the Fourth Proportional to 515,581.69, 772,457.50 and 215,401.63

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Solution

The fourth proportional to 515,581.69, 772,457.50 and 215,401.63 is: 322,720.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,581.69 : 772,457.50 = 215,401.63 : x
  2. Step 2: Convert to fraction form
    515,581.69/772,457.50 = 215,401.63/x
  3. Step 3: Cross multiply
    515,581.69x = 772,457.50 × 215,401.63
  4. Step 4: Simplify right side
    515,581.69x = 166,388,604,605.73
  5. Step 5: Solve for x
    x = 166,388,604,605.73/515,581.69
  6. Step 6: Final answer
    x = 322,720.16

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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.