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Finding the Fourth Proportional to 607.28, 838.32 and 358.76

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Solution

The fourth proportional to 607.28, 838.32 and 358.76 is: 495.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.28 : 838.32 = 358.76 : x
  2. Step 2: Convert to fraction form
    607.28/838.32 = 358.76/x
  3. Step 3: Cross multiply
    607.28x = 838.32 × 358.76
  4. Step 4: Simplify right side
    607.28x = 300,755.68
  5. Step 5: Solve for x
    x = 300,755.68/607.28
  6. Step 6: Final answer
    x = 495.25

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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.