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Finding the Fourth Proportional to 318,798.80, 439,194.04 and 221,835.91

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Solution

The fourth proportional to 318,798.80, 439,194.04 and 221,835.91 is: 305,612.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,798.80 : 439,194.04 = 221,835.91 : x
  2. Step 2: Convert to fraction form
    318,798.80/439,194.04 = 221,835.91/x
  3. Step 3: Cross multiply
    318,798.80x = 439,194.04 × 221,835.91
  4. Step 4: Simplify right side
    318,798.80x = 97,429,009,529.98
  5. Step 5: Solve for x
    x = 97,429,009,529.98/318,798.80
  6. Step 6: Final answer
    x = 305,612.85

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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.