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Finding the Fourth Proportional to 774.03, 1,068.36 and 479.12

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Solution

The fourth proportional to 774.03, 1,068.36 and 479.12 is: 661.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.03 : 1,068.36 = 479.12 : x
  2. Step 2: Convert to fraction form
    774.03/1,068.36 = 479.12/x
  3. Step 3: Cross multiply
    774.03x = 1,068.36 × 479.12
  4. Step 4: Simplify right side
    774.03x = 511,872.64
  5. Step 5: Solve for x
    x = 511,872.64/774.03
  6. Step 6: Final answer
    x = 661.31

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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.