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Finding the Fourth Proportional to 515,042.70, 772,564.05 and 215,423.70

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Solution

The fourth proportional to 515,042.70, 772,564.05 and 215,423.70 is: 323,135.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,042.70 : 772,564.05 = 215,423.70 : x
  2. Step 2: Convert to fraction form
    515,042.70/772,564.05 = 215,423.70/x
  3. Step 3: Cross multiply
    515,042.70x = 772,564.05 × 215,423.70
  4. Step 4: Simplify right side
    515,042.70x = 166,428,606,137.99
  5. Step 5: Solve for x
    x = 166,428,606,137.99/515,042.70
  6. Step 6: Final answer
    x = 323,135.55

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Similar ratio
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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.