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Finding the Fourth Proportional to 279,803.16, 385,960.14 and 170,857.76

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Solution

The fourth proportional to 279,803.16, 385,960.14 and 170,857.76 is: 235,680.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,803.16 : 385,960.14 = 170,857.76 : x
  2. Step 2: Convert to fraction form
    279,803.16/385,960.14 = 170,857.76/x
  3. Step 3: Cross multiply
    279,803.16x = 385,960.14 × 170,857.76
  4. Step 4: Simplify right side
    279,803.16x = 65,944,283,039.89
  5. Step 5: Solve for x
    x = 65,944,283,039.89/279,803.16
  6. Step 6: Final answer
    x = 235,680.98

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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.