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Finding the Fourth Proportional to 706.36, 975.06 and 639.67

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Solution

The fourth proportional to 706.36, 975.06 and 639.67 is: 883.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.36 : 975.06 = 639.67 : x
  2. Step 2: Convert to fraction form
    706.36/975.06 = 639.67/x
  3. Step 3: Cross multiply
    706.36x = 975.06 × 639.67
  4. Step 4: Simplify right side
    706.36x = 623,716.63
  5. Step 5: Solve for x
    x = 623,716.63/706.36
  6. Step 6: Final answer
    x = 883.00

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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.