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Finding the Fourth Proportional to 515,135.70, 772,703.55 and 215,516.70

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Solution

The fourth proportional to 515,135.70, 772,703.55 and 215,516.70 is: 323,275.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,135.70 : 772,703.55 = 215,516.70 : x
  2. Step 2: Convert to fraction form
    515,135.70/772,703.55 = 215,516.70/x
  3. Step 3: Cross multiply
    515,135.70x = 772,703.55 × 215,516.70
  4. Step 4: Simplify right side
    515,135.70x = 166,530,519,174.29
  5. Step 5: Solve for x
    x = 166,530,519,174.29/515,135.70
  6. Step 6: Final answer
    x = 323,275.05

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Similar ratio
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1.5x scale

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.