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Finding the Fourth Proportional to 1,509.26, 2,259.79 and 777.30

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Solution

The fourth proportional to 1,509.26, 2,259.79 and 777.30 is: 1,163.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,509.26 : 2,259.79 = 777.30 : x
  2. Step 2: Convert to fraction form
    1,509.26/2,259.79 = 777.30/x
  3. Step 3: Cross multiply
    1,509.26x = 2,259.79 × 777.30
  4. Step 4: Simplify right side
    1,509.26x = 1,756,534.77
  5. Step 5: Solve for x
    x = 1,756,534.77/1,509.26
  6. Step 6: Final answer
    x = 1,163.84

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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.