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Finding the Fourth Proportional to 1,029.64, 1,536.55 and 920.28

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Solution

The fourth proportional to 1,029.64, 1,536.55 and 920.28 is: 1,373.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.64 : 1,536.55 = 920.28 : x
  2. Step 2: Convert to fraction form
    1,029.64/1,536.55 = 920.28/x
  3. Step 3: Cross multiply
    1,029.64x = 1,536.55 × 920.28
  4. Step 4: Simplify right side
    1,029.64x = 1,414,056.23
  5. Step 5: Solve for x
    x = 1,414,056.23/1,029.64
  6. Step 6: Final answer
    x = 1,373.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.