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Finding the Fourth Proportional to 715.06, 986.38 and 637.30

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Solution

The fourth proportional to 715.06, 986.38 and 637.30 is: 879.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.06 : 986.38 = 637.30 : x
  2. Step 2: Convert to fraction form
    715.06/986.38 = 637.30/x
  3. Step 3: Cross multiply
    715.06x = 986.38 × 637.30
  4. Step 4: Simplify right side
    715.06x = 628,619.61
  5. Step 5: Solve for x
    x = 628,619.61/715.06
  6. Step 6: Final answer
    x = 879.11

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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.