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Finding the Fourth Proportional to 774.41, 1,068.30 and 508.75

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Solution

The fourth proportional to 774.41, 1,068.30 and 508.75 is: 701.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.41 : 1,068.30 = 508.75 : x
  2. Step 2: Convert to fraction form
    774.41/1,068.30 = 508.75/x
  3. Step 3: Cross multiply
    774.41x = 1,068.30 × 508.75
  4. Step 4: Simplify right side
    774.41x = 543,494.95
  5. Step 5: Solve for x
    x = 543,494.95/774.41
  6. Step 6: Final answer
    x = 701.82

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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.