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Finding the Fourth Proportional to 628.65, 943.47 and 354.69

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Solution

The fourth proportional to 628.65, 943.47 and 354.69 is: 532.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.65 : 943.47 = 354.69 : x
  2. Step 2: Convert to fraction form
    628.65/943.47 = 354.69/x
  3. Step 3: Cross multiply
    628.65x = 943.47 × 354.69
  4. Step 4: Simplify right side
    628.65x = 334,639.37
  5. Step 5: Solve for x
    x = 334,639.37/628.65
  6. Step 6: Final answer
    x = 532.31

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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.