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Finding the Fourth Proportional to 520,041.80, 780,062.70 and 323,433.80

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Solution

The fourth proportional to 520,041.80, 780,062.70 and 323,433.80 is: 485,150.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,041.80 : 780,062.70 = 323,433.80 : x
  2. Step 2: Convert to fraction form
    520,041.80/780,062.70 = 323,433.80/x
  3. Step 3: Cross multiply
    520,041.80x = 780,062.70 × 323,433.80
  4. Step 4: Simplify right side
    520,041.80x = 252,298,643,299.26
  5. Step 5: Solve for x
    x = 252,298,643,299.26/520,041.80
  6. Step 6: Final answer
    x = 485,150.70

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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.