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Finding the Fourth Proportional to 662.80, 929.20 and 662.80

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Solution

The fourth proportional to 662.80, 929.20 and 662.80 is: 929.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.80 : 929.20 = 662.80 : x
  2. Step 2: Convert to fraction form
    662.80/929.20 = 662.80/x
  3. Step 3: Cross multiply
    662.80x = 929.20 × 662.80
  4. Step 4: Simplify right side
    662.80x = 615,873.76
  5. Step 5: Solve for x
    x = 615,873.76/662.80
  6. Step 6: Final answer
    x = 929.20

Related Problems

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.