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Finding the Fourth Proportional to 312,535.99, 431,331.60 and 225,393.10

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Solution

The fourth proportional to 312,535.99, 431,331.60 and 225,393.10 is: 311,065.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,535.99 : 431,331.60 = 225,393.10 : x
  2. Step 2: Convert to fraction form
    312,535.99/431,331.60 = 225,393.10/x
  3. Step 3: Cross multiply
    312,535.99x = 431,331.60 × 225,393.10
  4. Step 4: Simplify right side
    312,535.99x = 97,219,166,451.96
  5. Step 5: Solve for x
    x = 97,219,166,451.96/312,535.99
  6. Step 6: Final answer
    x = 311,065.51

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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.