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Finding the Fourth Proportional to 804.96, 1,207.60 and 440.08

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Solution

The fourth proportional to 804.96, 1,207.60 and 440.08 is: 660.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.96 : 1,207.60 = 440.08 : x
  2. Step 2: Convert to fraction form
    804.96/1,207.60 = 440.08/x
  3. Step 3: Cross multiply
    804.96x = 1,207.60 × 440.08
  4. Step 4: Simplify right side
    804.96x = 531,440.61
  5. Step 5: Solve for x
    x = 531,440.61/804.96
  6. Step 6: Final answer
    x = 660.21

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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.