Home / 630.01-869.66-397.09

Finding the Fourth Proportional to 630.01, 869.66 and 397.09

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Solution

The fourth proportional to 630.01, 869.66 and 397.09 is: 548.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.01 : 869.66 = 397.09 : x
  2. Step 2: Convert to fraction form
    630.01/869.66 = 397.09/x
  3. Step 3: Cross multiply
    630.01x = 869.66 × 397.09
  4. Step 4: Simplify right side
    630.01x = 345,333.29
  5. Step 5: Solve for x
    x = 345,333.29/630.01
  6. Step 6: Final answer
    x = 548.14

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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.