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Finding the Fourth Proportional to 500.39, 690.56 and 276.32

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Solution

The fourth proportional to 500.39, 690.56 and 276.32 is: 381.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.39 : 690.56 = 276.32 : x
  2. Step 2: Convert to fraction form
    500.39/690.56 = 276.32/x
  3. Step 3: Cross multiply
    500.39x = 690.56 × 276.32
  4. Step 4: Simplify right side
    500.39x = 190,813.81
  5. Step 5: Solve for x
    x = 190,813.81/500.39
  6. Step 6: Final answer
    x = 381.33

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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.