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Finding the Fourth Proportional to 1,807.69, 2,711.67 and 509.26

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Solution

The fourth proportional to 1,807.69, 2,711.67 and 509.26 is: 763.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,807.69 : 2,711.67 = 509.26 : x
  2. Step 2: Convert to fraction form
    1,807.69/2,711.67 = 509.26/x
  3. Step 3: Cross multiply
    1,807.69x = 2,711.67 × 509.26
  4. Step 4: Simplify right side
    1,807.69x = 1,380,945.06
  5. Step 5: Solve for x
    x = 1,380,945.06/1,807.69
  6. Step 6: Final answer
    x = 763.93

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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.