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Finding the Fourth Proportional to 1,502.12, 2,072.36 and 912.44

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Solution

The fourth proportional to 1,502.12, 2,072.36 and 912.44 is: 1,258.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,502.12 : 2,072.36 = 912.44 : x
  2. Step 2: Convert to fraction form
    1,502.12/2,072.36 = 912.44/x
  3. Step 3: Cross multiply
    1,502.12x = 2,072.36 × 912.44
  4. Step 4: Simplify right side
    1,502.12x = 1,890,904.16
  5. Step 5: Solve for x
    x = 1,890,904.16/1,502.12
  6. Step 6: Final answer
    x = 1,258.82

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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.