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Finding the Fourth Proportional to 445,409.70, 668,114.55 and 396,420.90

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Solution

The fourth proportional to 445,409.70, 668,114.55 and 396,420.90 is: 594,631.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,409.70 : 668,114.55 = 396,420.90 : x
  2. Step 2: Convert to fraction form
    445,409.70/668,114.55 = 396,420.90/x
  3. Step 3: Cross multiply
    445,409.70x = 668,114.55 × 396,420.90
  4. Step 4: Simplify right side
    445,409.70x = 264,854,571,214.10
  5. Step 5: Solve for x
    x = 264,854,571,214.10/445,409.70
  6. Step 6: Final answer
    x = 594,631.35

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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.