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Finding the Fourth Proportional to 630.60, 945.90 and 436.20

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Solution

The fourth proportional to 630.60, 945.90 and 436.20 is: 654.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.60 : 945.90 = 436.20 : x
  2. Step 2: Convert to fraction form
    630.60/945.90 = 436.20/x
  3. Step 3: Cross multiply
    630.60x = 945.90 × 436.20
  4. Step 4: Simplify right side
    630.60x = 412,601.58
  5. Step 5: Solve for x
    x = 412,601.58/630.60
  6. Step 6: Final answer
    x = 654.30

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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.