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Finding the Fourth Proportional to 664,644.20, 996,966.30 and 345,779.60

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Solution

The fourth proportional to 664,644.20, 996,966.30 and 345,779.60 is: 518,669.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,644.20 : 996,966.30 = 345,779.60 : x
  2. Step 2: Convert to fraction form
    664,644.20/996,966.30 = 345,779.60/x
  3. Step 3: Cross multiply
    664,644.20x = 996,966.30 × 345,779.60
  4. Step 4: Simplify right side
    664,644.20x = 344,730,608,427.48
  5. Step 5: Solve for x
    x = 344,730,608,427.48/664,644.20
  6. Step 6: Final answer
    x = 518,669.40

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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.