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Finding the Fourth Proportional to 662,979.40, 994,469.10 and 289,731.40

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Solution

The fourth proportional to 662,979.40, 994,469.10 and 289,731.40 is: 434,597.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,979.40 : 994,469.10 = 289,731.40 : x
  2. Step 2: Convert to fraction form
    662,979.40/994,469.10 = 289,731.40/x
  3. Step 3: Cross multiply
    662,979.40x = 994,469.10 × 289,731.40
  4. Step 4: Simplify right side
    662,979.40x = 288,128,924,599.74
  5. Step 5: Solve for x
    x = 288,128,924,599.74/662,979.40
  6. Step 6: Final answer
    x = 434,597.10

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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.