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Finding the Fourth Proportional to 1,011.16, 1,392.28 and 969.67

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Solution

The fourth proportional to 1,011.16, 1,392.28 and 969.67 is: 1,335.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.16 : 1,392.28 = 969.67 : x
  2. Step 2: Convert to fraction form
    1,011.16/1,392.28 = 969.67/x
  3. Step 3: Cross multiply
    1,011.16x = 1,392.28 × 969.67
  4. Step 4: Simplify right side
    1,011.16x = 1,350,052.15
  5. Step 5: Solve for x
    x = 1,350,052.15/1,011.16
  6. Step 6: Final answer
    x = 1,335.15

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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.