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Finding the Fourth Proportional to 1,284.51, 1,924.29 and 667.29

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Solution

The fourth proportional to 1,284.51, 1,924.29 and 667.29 is: 999.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.51 : 1,924.29 = 667.29 : x
  2. Step 2: Convert to fraction form
    1,284.51/1,924.29 = 667.29/x
  3. Step 3: Cross multiply
    1,284.51x = 1,924.29 × 667.29
  4. Step 4: Simplify right side
    1,284.51x = 1,284,059.47
  5. Step 5: Solve for x
    x = 1,284,059.47/1,284.51
  6. Step 6: Final answer
    x = 999.65

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1.5x scale

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.