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Finding the Fourth Proportional to 5,207.51, 7,811.19 and 1,509.69

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Solution

The fourth proportional to 5,207.51, 7,811.19 and 1,509.69 is: 2,264.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,207.51 : 7,811.19 = 1,509.69 : x
  2. Step 2: Convert to fraction form
    5,207.51/7,811.19 = 1,509.69/x
  3. Step 3: Cross multiply
    5,207.51x = 7,811.19 × 1,509.69
  4. Step 4: Simplify right side
    5,207.51x = 11,792,475.43
  5. Step 5: Solve for x
    x = 11,792,475.43/5,207.51
  6. Step 6: Final answer
    x = 2,264.52

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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.