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Finding the Fourth Proportional to 630.68, 870.03 and 464.54

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Solution

The fourth proportional to 630.68, 870.03 and 464.54 is: 640.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.68 : 870.03 = 464.54 : x
  2. Step 2: Convert to fraction form
    630.68/870.03 = 464.54/x
  3. Step 3: Cross multiply
    630.68x = 870.03 × 464.54
  4. Step 4: Simplify right side
    630.68x = 404,163.74
  5. Step 5: Solve for x
    x = 404,163.74/630.68
  6. Step 6: Final answer
    x = 640.84

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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.