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Finding the Fourth Proportional to 775.67, 1,070.28 and 460.98

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Solution

The fourth proportional to 775.67, 1,070.28 and 460.98 is: 636.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.67 : 1,070.28 = 460.98 : x
  2. Step 2: Convert to fraction form
    775.67/1,070.28 = 460.98/x
  3. Step 3: Cross multiply
    775.67x = 1,070.28 × 460.98
  4. Step 4: Simplify right side
    775.67x = 493,377.67
  5. Step 5: Solve for x
    x = 493,377.67/775.67
  6. Step 6: Final answer
    x = 636.07

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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.