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Finding the Fourth Proportional to 809,903.10, 1,215,000.45 and 336,636.30

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Solution

The fourth proportional to 809,903.10, 1,215,000.45 and 336,636.30 is: 505,015.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,903.10 : 1,215,000.45 = 336,636.30 : x
  2. Step 2: Convert to fraction form
    809,903.10/1,215,000.45 = 336,636.30/x
  3. Step 3: Cross multiply
    809,903.10x = 1,215,000.45 × 336,636.30
  4. Step 4: Simplify right side
    809,903.10x = 409,013,255,986.34
  5. Step 5: Solve for x
    x = 409,013,255,986.34/809,903.10
  6. Step 6: Final answer
    x = 505,015.05

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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.