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Finding the Fourth Proportional to 295,890.84, 443,901.87 and 85,512.78

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Solution

The fourth proportional to 295,890.84, 443,901.87 and 85,512.78 is: 128,288.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,890.84 : 443,901.87 = 85,512.78 : x
  2. Step 2: Convert to fraction form
    295,890.84/443,901.87 = 85,512.78/x
  3. Step 3: Cross multiply
    295,890.84x = 443,901.87 × 85,512.78
  4. Step 4: Simplify right side
    295,890.84x = 37,959,282,950.90
  5. Step 5: Solve for x
    x = 37,959,282,950.90/295,890.84
  6. Step 6: Final answer
    x = 128,288.13

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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.