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Finding the Fourth Proportional to 1,302.34, 1,797.28 and 778.28

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Solution

The fourth proportional to 1,302.34, 1,797.28 and 778.28 is: 1,074.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,302.34 : 1,797.28 = 778.28 : x
  2. Step 2: Convert to fraction form
    1,302.34/1,797.28 = 778.28/x
  3. Step 3: Cross multiply
    1,302.34x = 1,797.28 × 778.28
  4. Step 4: Simplify right side
    1,302.34x = 1,398,787.08
  5. Step 5: Solve for x
    x = 1,398,787.08/1,302.34
  6. Step 6: Final answer
    x = 1,074.06

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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.