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Finding the Fourth Proportional to 404,420.30, 606,630.45 and 311,108.30

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Solution

The fourth proportional to 404,420.30, 606,630.45 and 311,108.30 is: 466,662.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,420.30 : 606,630.45 = 311,108.30 : x
  2. Step 2: Convert to fraction form
    404,420.30/606,630.45 = 311,108.30/x
  3. Step 3: Cross multiply
    404,420.30x = 606,630.45 × 311,108.30
  4. Step 4: Simplify right side
    404,420.30x = 188,727,768,027.74
  5. Step 5: Solve for x
    x = 188,727,768,027.74/404,420.30
  6. Step 6: Final answer
    x = 466,662.45

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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.