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Finding the Fourth Proportional to 912.04, 1,260.28 and 867.08

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Solution

The fourth proportional to 912.04, 1,260.28 and 867.08 is: 1,198.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.04 : 1,260.28 = 867.08 : x
  2. Step 2: Convert to fraction form
    912.04/1,260.28 = 867.08/x
  3. Step 3: Cross multiply
    912.04x = 1,260.28 × 867.08
  4. Step 4: Simplify right side
    912.04x = 1,092,763.58
  5. Step 5: Solve for x
    x = 1,092,763.58/912.04
  6. Step 6: Final answer
    x = 1,198.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.