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Finding the Fourth Proportional to 628.86, 867.45 and 463.50

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Solution

The fourth proportional to 628.86, 867.45 and 463.50 is: 639.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.86 : 867.45 = 463.50 : x
  2. Step 2: Convert to fraction form
    628.86/867.45 = 463.50/x
  3. Step 3: Cross multiply
    628.86x = 867.45 × 463.50
  4. Step 4: Simplify right side
    628.86x = 402,063.08
  5. Step 5: Solve for x
    x = 402,063.08/628.86
  6. Step 6: Final answer
    x = 639.35

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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.