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Finding the Fourth Proportional to 695.58, 960.21 and 486.45

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Solution

The fourth proportional to 695.58, 960.21 and 486.45 is: 671.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.58 : 960.21 = 486.45 : x
  2. Step 2: Convert to fraction form
    695.58/960.21 = 486.45/x
  3. Step 3: Cross multiply
    695.58x = 960.21 × 486.45
  4. Step 4: Simplify right side
    695.58x = 467,094.15
  5. Step 5: Solve for x
    x = 467,094.15/695.58
  6. Step 6: Final answer
    x = 671.52

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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.