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Finding the Fourth Proportional to 656.64, 905.04 and 482.76

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Solution

The fourth proportional to 656.64, 905.04 and 482.76 is: 665.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.64 : 905.04 = 482.76 : x
  2. Step 2: Convert to fraction form
    656.64/905.04 = 482.76/x
  3. Step 3: Cross multiply
    656.64x = 905.04 × 482.76
  4. Step 4: Simplify right side
    656.64x = 436,917.11
  5. Step 5: Solve for x
    x = 436,917.11/656.64
  6. Step 6: Final answer
    x = 665.38

Related Problems

Find fourth proportional to 328.32, 452.52 and 241.38
Half scale
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Double scale
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Similar ratio
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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.