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Finding the Fourth Proportional to 630.67, 870.38 and 365.21

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Solution

The fourth proportional to 630.67, 870.38 and 365.21 is: 504.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.67 : 870.38 = 365.21 : x
  2. Step 2: Convert to fraction form
    630.67/870.38 = 365.21/x
  3. Step 3: Cross multiply
    630.67x = 870.38 × 365.21
  4. Step 4: Simplify right side
    630.67x = 317,865.30
  5. Step 5: Solve for x
    x = 317,865.30/630.67
  6. Step 6: Final answer
    x = 504.01

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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.