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Finding the Fourth Proportional to 389,370.32, 537,325.64 and 219,658.96

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Solution

The fourth proportional to 389,370.32, 537,325.64 and 219,658.96 is: 303,126.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,370.32 : 537,325.64 = 219,658.96 : x
  2. Step 2: Convert to fraction form
    389,370.32/537,325.64 = 219,658.96/x
  3. Step 3: Cross multiply
    389,370.32x = 537,325.64 × 219,658.96
  4. Step 4: Simplify right side
    389,370.32x = 118,028,391,263.73
  5. Step 5: Solve for x
    x = 118,028,391,263.73/389,370.32
  6. Step 6: Final answer
    x = 303,126.32

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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.