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Finding the Fourth Proportional to 1,810.71, 2,715.76 and 511.88

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Solution

The fourth proportional to 1,810.71, 2,715.76 and 511.88 is: 767.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,810.71 : 2,715.76 = 511.88 : x
  2. Step 2: Convert to fraction form
    1,810.71/2,715.76 = 511.88/x
  3. Step 3: Cross multiply
    1,810.71x = 2,715.76 × 511.88
  4. Step 4: Simplify right side
    1,810.71x = 1,390,130.29
  5. Step 5: Solve for x
    x = 1,390,130.29/1,810.71
  6. Step 6: Final answer
    x = 767.73

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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.