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Finding the Fourth Proportional to 307,314.36, 423,811.98 and 210,658.68

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Solution

The fourth proportional to 307,314.36, 423,811.98 and 210,658.68 is: 290,515.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,314.36 : 423,811.98 = 210,658.68 : x
  2. Step 2: Convert to fraction form
    307,314.36/423,811.98 = 210,658.68/x
  3. Step 3: Cross multiply
    307,314.36x = 423,811.98 × 210,658.68
  4. Step 4: Simplify right side
    307,314.36x = 89,279,672,274.99
  5. Step 5: Solve for x
    x = 89,279,672,274.99/307,314.36
  6. Step 6: Final answer
    x = 290,515.78

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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.