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Finding the Fourth Proportional to 736.60, 1,015.38 and 474.28

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Solution

The fourth proportional to 736.60, 1,015.38 and 474.28 is: 653.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.60 : 1,015.38 = 474.28 : x
  2. Step 2: Convert to fraction form
    736.60/1,015.38 = 474.28/x
  3. Step 3: Cross multiply
    736.60x = 1,015.38 × 474.28
  4. Step 4: Simplify right side
    736.60x = 481,574.43
  5. Step 5: Solve for x
    x = 481,574.43/736.60
  6. Step 6: Final answer
    x = 653.78

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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.