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Finding the Fourth Proportional to 630.94, 870.61 and 351.13

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Solution

The fourth proportional to 630.94, 870.61 and 351.13 is: 484.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.94 : 870.61 = 351.13 : x
  2. Step 2: Convert to fraction form
    630.94/870.61 = 351.13/x
  3. Step 3: Cross multiply
    630.94x = 870.61 × 351.13
  4. Step 4: Simplify right side
    630.94x = 305,697.29
  5. Step 5: Solve for x
    x = 305,697.29/630.94
  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.