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Finding the Fourth Proportional to 423.46, 631.69 and 358.86

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Solution

The fourth proportional to 423.46, 631.69 and 358.86 is: 535.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.46 : 631.69 = 358.86 : x
  2. Step 2: Convert to fraction form
    423.46/631.69 = 358.86/x
  3. Step 3: Cross multiply
    423.46x = 631.69 × 358.86
  4. Step 4: Simplify right side
    423.46x = 226,688.27
  5. Step 5: Solve for x
    x = 226,688.27/423.46
  6. Step 6: Final answer
    x = 535.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.