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Finding the Fourth Proportional to 670.58, 999.29 and 648.56

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Solution

The fourth proportional to 670.58, 999.29 and 648.56 is: 966.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.58 : 999.29 = 648.56 : x
  2. Step 2: Convert to fraction form
    670.58/999.29 = 648.56/x
  3. Step 3: Cross multiply
    670.58x = 999.29 × 648.56
  4. Step 4: Simplify right side
    670.58x = 648,103.64
  5. Step 5: Solve for x
    x = 648,103.64/670.58
  6. Step 6: Final answer
    x = 966.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.