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Finding the Fourth Proportional to 552,858.80, 762,944.45 and 311,143.10

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Solution

The fourth proportional to 552,858.80, 762,944.45 and 311,143.10 is: 429,377.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,858.80 : 762,944.45 = 311,143.10 : x
  2. Step 2: Convert to fraction form
    552,858.80/762,944.45 = 311,143.10/x
  3. Step 3: Cross multiply
    552,858.80x = 762,944.45 × 311,143.10
  4. Step 4: Simplify right side
    552,858.80x = 237,384,901,300.80
  5. Step 5: Solve for x
    x = 237,384,901,300.80/552,858.80
  6. Step 6: Final answer
    x = 429,377.09

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1.5x scale

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.