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Finding the Fourth Proportional to 1,283.15, 1,924.72 and 991.08

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Solution

The fourth proportional to 1,283.15, 1,924.72 and 991.08 is: 1,486.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.15 : 1,924.72 = 991.08 : x
  2. Step 2: Convert to fraction form
    1,283.15/1,924.72 = 991.08/x
  3. Step 3: Cross multiply
    1,283.15x = 1,924.72 × 991.08
  4. Step 4: Simplify right side
    1,283.15x = 1,907,549.02
  5. Step 5: Solve for x
    x = 1,907,549.02/1,283.15
  6. Step 6: Final answer
    x = 1,486.61

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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.