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Finding the Fourth Proportional to 296,638.63, 445,033.30 and 86,276.57

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Solution

The fourth proportional to 296,638.63, 445,033.30 and 86,276.57 is: 129,436.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,638.63 : 445,033.30 = 86,276.57 : x
  2. Step 2: Convert to fraction form
    296,638.63/445,033.30 = 86,276.57/x
  3. Step 3: Cross multiply
    296,638.63x = 445,033.30 × 86,276.57
  4. Step 4: Simplify right side
    296,638.63x = 38,395,946,641.35
  5. Step 5: Solve for x
    x = 38,395,946,641.35/296,638.63
  6. Step 6: Final answer
    x = 129,436.77

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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.