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Finding the Fourth Proportional to 288,981.88, 433,429.08 and 78,636.22

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Solution

The fourth proportional to 288,981.88, 433,429.08 and 78,636.22 is: 117,942.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,981.88 : 433,429.08 = 78,636.22 : x
  2. Step 2: Convert to fraction form
    288,981.88/433,429.08 = 78,636.22/x
  3. Step 3: Cross multiply
    288,981.88x = 433,429.08 × 78,636.22
  4. Step 4: Simplify right side
    288,981.88x = 34,083,224,489.28
  5. Step 5: Solve for x
    x = 34,083,224,489.28/288,981.88
  6. Step 6: Final answer
    x = 117,942.43

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1.5x scale

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.