Home / 807,520.81-1,211,840.63-321,153.11

Finding the Fourth Proportional to 807,520.81, 1,211,840.63 and 321,153.11

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Solution

The fourth proportional to 807,520.81, 1,211,840.63 and 321,153.11 is: 481,952.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,520.81 : 1,211,840.63 = 321,153.11 : x
  2. Step 2: Convert to fraction form
    807,520.81/1,211,840.63 = 321,153.11/x
  3. Step 3: Cross multiply
    807,520.81x = 1,211,840.63 × 321,153.11
  4. Step 4: Simplify right side
    807,520.81x = 389,186,381,892.54
  5. Step 5: Solve for x
    x = 389,186,381,892.54/807,520.81
  6. Step 6: Final answer
    x = 481,952.14

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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.