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Finding the Fourth Proportional to 999.65, 1,497.86 and 756.65

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Solution

The fourth proportional to 999.65, 1,497.86 and 756.65 is: 1,133.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.65 : 1,497.86 = 756.65 : x
  2. Step 2: Convert to fraction form
    999.65/1,497.86 = 756.65/x
  3. Step 3: Cross multiply
    999.65x = 1,497.86 × 756.65
  4. Step 4: Simplify right side
    999.65x = 1,133,358.57
  5. Step 5: Solve for x
    x = 1,133,358.57/999.65
  6. Step 6: Final answer
    x = 1,133.75

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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.