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Finding the Fourth Proportional to 630.15, 870.03 and 464.55

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Solution

The fourth proportional to 630.15, 870.03 and 464.55 is: 641.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.15 : 870.03 = 464.55 : x
  2. Step 2: Convert to fraction form
    630.15/870.03 = 464.55/x
  3. Step 3: Cross multiply
    630.15x = 870.03 × 464.55
  4. Step 4: Simplify right side
    630.15x = 404,172.44
  5. Step 5: Solve for x
    x = 404,172.44/630.15
  6. Step 6: Final answer
    x = 641.39

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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.