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Finding the Fourth Proportional to 630.16, 873.37 and 620.80

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Solution

The fourth proportional to 630.16, 873.37 and 620.80 is: 860.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.16 : 873.37 = 620.80 : x
  2. Step 2: Convert to fraction form
    630.16/873.37 = 620.80/x
  3. Step 3: Cross multiply
    630.16x = 873.37 × 620.80
  4. Step 4: Simplify right side
    630.16x = 542,188.10
  5. Step 5: Solve for x
    x = 542,188.10/630.16
  6. Step 6: Final answer
    x = 860.40

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.