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Finding the Fourth Proportional to 385,235.60, 531,622.08 and 215,469.60

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Solution

The fourth proportional to 385,235.60, 531,622.08 and 215,469.60 is: 297,346.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,235.60 : 531,622.08 = 215,469.60 : x
  2. Step 2: Convert to fraction form
    385,235.60/531,622.08 = 215,469.60/x
  3. Step 3: Cross multiply
    385,235.60x = 531,622.08 × 215,469.60
  4. Step 4: Simplify right side
    385,235.60x = 114,548,396,928.77
  5. Step 5: Solve for x
    x = 114,548,396,928.77/385,235.60
  6. Step 6: Final answer
    x = 297,346.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.