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Finding the Fourth Proportional to 389,440.70, 584,117.85 and 108,986.30

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Solution

The fourth proportional to 389,440.70, 584,117.85 and 108,986.30 is: 163,467.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,440.70 : 584,117.85 = 108,986.30 : x
  2. Step 2: Convert to fraction form
    389,440.70/584,117.85 = 108,986.30/x
  3. Step 3: Cross multiply
    389,440.70x = 584,117.85 × 108,986.30
  4. Step 4: Simplify right side
    389,440.70x = 63,660,843,235.46
  5. Step 5: Solve for x
    x = 63,660,843,235.46/389,440.70
  6. Step 6: Final answer
    x = 163,467.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.