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Finding the Fourth Proportional to 644,446.40, 966,669.60 and 289,630.40

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Solution

The fourth proportional to 644,446.40, 966,669.60 and 289,630.40 is: 434,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,446.40 : 966,669.60 = 289,630.40 : x
  2. Step 2: Convert to fraction form
    644,446.40/966,669.60 = 289,630.40/x
  3. Step 3: Cross multiply
    644,446.40x = 966,669.60 × 289,630.40
  4. Step 4: Simplify right side
    644,446.40x = 279,976,902,915.84
  5. Step 5: Solve for x
    x = 279,976,902,915.84/644,446.40
  6. Step 6: Final answer
    x = 434,445.60

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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.