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Finding the Fourth Proportional to 401.56, 603.36 and 358.64

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Solution

The fourth proportional to 401.56, 603.36 and 358.64 is: 538.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.56 : 603.36 = 358.64 : x
  2. Step 2: Convert to fraction form
    401.56/603.36 = 358.64/x
  3. Step 3: Cross multiply
    401.56x = 603.36 × 358.64
  4. Step 4: Simplify right side
    401.56x = 216,389.03
  5. Step 5: Solve for x
    x = 216,389.03/401.56
  6. Step 6: Final answer
    x = 538.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.