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Finding the Fourth Proportional to 777.70, 1,073.30 and 446.24

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Solution

The fourth proportional to 777.70, 1,073.30 and 446.24 is: 615.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.70 : 1,073.30 = 446.24 : x
  2. Step 2: Convert to fraction form
    777.70/1,073.30 = 446.24/x
  3. Step 3: Cross multiply
    777.70x = 1,073.30 × 446.24
  4. Step 4: Simplify right side
    777.70x = 478,949.39
  5. Step 5: Solve for x
    x = 478,949.39/777.70
  6. Step 6: Final answer
    x = 615.85

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1.5x scale

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.