Home / 809,403.20-1,215,487.20-530,158.40

Finding the Fourth Proportional to 809,403.20, 1,215,487.20 and 530,158.40

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Solution

The fourth proportional to 809,403.20, 1,215,487.20 and 530,158.40 is: 796,143.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,403.20 : 1,215,487.20 = 530,158.40 : x
  2. Step 2: Convert to fraction form
    809,403.20/1,215,487.20 = 530,158.40/x
  3. Step 3: Cross multiply
    809,403.20x = 1,215,487.20 × 530,158.40
  4. Step 4: Simplify right side
    809,403.20x = 644,400,749,172.48
  5. Step 5: Solve for x
    x = 644,400,749,172.48/809,403.20
  6. Step 6: Final answer
    x = 796,143.07

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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.