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Finding the Fourth Proportional to 774.07, 1,068.12 and 479.02

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Solution

The fourth proportional to 774.07, 1,068.12 and 479.02 is: 660.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.07 : 1,068.12 = 479.02 : x
  2. Step 2: Convert to fraction form
    774.07/1,068.12 = 479.02/x
  3. Step 3: Cross multiply
    774.07x = 1,068.12 × 479.02
  4. Step 4: Simplify right side
    774.07x = 511,650.84
  5. Step 5: Solve for x
    x = 511,650.84/774.07
  6. Step 6: Final answer
    x = 660.99

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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.