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Finding the Fourth Proportional to 662,642.70, 993,964.05 and 219,410.70

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Solution

The fourth proportional to 662,642.70, 993,964.05 and 219,410.70 is: 329,116.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,642.70 : 993,964.05 = 219,410.70 : x
  2. Step 2: Convert to fraction form
    662,642.70/993,964.05 = 219,410.70/x
  3. Step 3: Cross multiply
    662,642.70x = 993,964.05 × 219,410.70
  4. Step 4: Simplify right side
    662,642.70x = 218,086,347,985.34
  5. Step 5: Solve for x
    x = 218,086,347,985.34/662,642.70
  6. Step 6: Final answer
    x = 329,116.05

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.