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Finding the Fourth Proportional to 1,260.89, 1,891.47 and 530.81

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Solution

The fourth proportional to 1,260.89, 1,891.47 and 530.81 is: 796.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.89 : 1,891.47 = 530.81 : x
  2. Step 2: Convert to fraction form
    1,260.89/1,891.47 = 530.81/x
  3. Step 3: Cross multiply
    1,260.89x = 1,891.47 × 530.81
  4. Step 4: Simplify right side
    1,260.89x = 1,004,011.19
  5. Step 5: Solve for x
    x = 1,004,011.19/1,260.89
  6. Step 6: Final answer
    x = 796.27

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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.