Home / 665,090.20-997,635.30-455,138.20

Finding the Fourth Proportional to 665,090.20, 997,635.30 and 455,138.20

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Solution

The fourth proportional to 665,090.20, 997,635.30 and 455,138.20 is: 682,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,090.20 : 997,635.30 = 455,138.20 : x
  2. Step 2: Convert to fraction form
    665,090.20/997,635.30 = 455,138.20/x
  3. Step 3: Cross multiply
    665,090.20x = 997,635.30 × 455,138.20
  4. Step 4: Simplify right side
    665,090.20x = 454,061,934,698.46
  5. Step 5: Solve for x
    x = 454,061,934,698.46/665,090.20
  6. Step 6: Final answer
    x = 682,707.30

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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.