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Finding the Fourth Proportional to 630.85, 870.61 and 351.08

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Solution

The fourth proportional to 630.85, 870.61 and 351.08 is: 484.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.85 : 870.61 = 351.08 : x
  2. Step 2: Convert to fraction form
    630.85/870.61 = 351.08/x
  3. Step 3: Cross multiply
    630.85x = 870.61 × 351.08
  4. Step 4: Simplify right side
    630.85x = 305,653.11
  5. Step 5: Solve for x
    x = 305,653.11/630.85
  6. Step 6: Final answer
    x = 484.51

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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.