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Finding the Fourth Proportional to 953.38, 1,428.70 and 541.65

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Solution

The fourth proportional to 953.38, 1,428.70 and 541.65 is: 811.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.38 : 1,428.70 = 541.65 : x
  2. Step 2: Convert to fraction form
    953.38/1,428.70 = 541.65/x
  3. Step 3: Cross multiply
    953.38x = 1,428.70 × 541.65
  4. Step 4: Simplify right side
    953.38x = 773,846.80
  5. Step 5: Solve for x
    x = 773,846.80/953.38
  6. Step 6: Final answer
    x = 811.69

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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.