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Finding the Fourth Proportional to 710.67, 979.77 and 637.77

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Solution

The fourth proportional to 710.67, 979.77 and 637.77 is: 879.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.67 : 979.77 = 637.77 : x
  2. Step 2: Convert to fraction form
    710.67/979.77 = 637.77/x
  3. Step 3: Cross multiply
    710.67x = 979.77 × 637.77
  4. Step 4: Simplify right side
    710.67x = 624,867.91
  5. Step 5: Solve for x
    x = 624,867.91/710.67
  6. Step 6: Final answer
    x = 879.27

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1.5x scale

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.