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Finding the Fourth Proportional to 318,500.35, 439,711.77 and 211,215.22

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Solution

The fourth proportional to 318,500.35, 439,711.77 and 211,215.22 is: 291,597.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,500.35 : 439,711.77 = 211,215.22 : x
  2. Step 2: Convert to fraction form
    318,500.35/439,711.77 = 211,215.22/x
  3. Step 3: Cross multiply
    318,500.35x = 439,711.77 × 211,215.22
  4. Step 4: Simplify right side
    318,500.35x = 92,873,818,237.14
  5. Step 5: Solve for x
    x = 92,873,818,237.14/318,500.35
  6. Step 6: Final answer
    x = 291,597.23

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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.