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Finding the Fourth Proportional to 662,385.69, 993,706.11 and 213,219.63

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Solution

The fourth proportional to 662,385.69, 993,706.11 and 213,219.63 is: 319,870.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,385.69 : 993,706.11 = 213,219.63 : x
  2. Step 2: Convert to fraction form
    662,385.69/993,706.11 = 213,219.63/x
  3. Step 3: Cross multiply
    662,385.69x = 993,706.11 × 213,219.63
  4. Step 4: Simplify right side
    662,385.69x = 211,877,649,102.94
  5. Step 5: Solve for x
    x = 211,877,649,102.94/662,385.69
  6. Step 6: Final answer
    x = 319,870.51

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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.