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Finding the Fourth Proportional to 1,810.13, 2,715.14 and 511.61

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Solution

The fourth proportional to 1,810.13, 2,715.14 and 511.61 is: 767.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,810.13 : 2,715.14 = 511.61 : x
  2. Step 2: Convert to fraction form
    1,810.13/2,715.14 = 511.61/x
  3. Step 3: Cross multiply
    1,810.13x = 2,715.14 × 511.61
  4. Step 4: Simplify right side
    1,810.13x = 1,389,076.64
  5. Step 5: Solve for x
    x = 1,389,076.64/1,810.13
  6. Step 6: Final answer
    x = 767.39

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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.