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Finding the Fourth Proportional to 515,087.70, 772,631.55 and 215,468.70

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Solution

The fourth proportional to 515,087.70, 772,631.55 and 215,468.70 is: 323,203.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,087.70 : 772,631.55 = 215,468.70 : x
  2. Step 2: Convert to fraction form
    515,087.70/772,631.55 = 215,468.70/x
  3. Step 3: Cross multiply
    515,087.70x = 772,631.55 × 215,468.70
  4. Step 4: Simplify right side
    515,087.70x = 166,477,915,657.49
  5. Step 5: Solve for x
    x = 166,477,915,657.49/515,087.70
  6. Step 6: Final answer
    x = 323,203.05

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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.