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Finding the Fourth Proportional to 520,316.37, 780,000.90 and 200,263.90

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Solution

The fourth proportional to 520,316.37, 780,000.90 and 200,263.90 is: 300,213.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,316.37 : 780,000.90 = 200,263.90 : x
  2. Step 2: Convert to fraction form
    520,316.37/780,000.90 = 200,263.90/x
  3. Step 3: Cross multiply
    520,316.37x = 780,000.90 × 200,263.90
  4. Step 4: Simplify right side
    520,316.37x = 156,206,022,237.51
  5. Step 5: Solve for x
    x = 156,206,022,237.51/520,316.37
  6. Step 6: Final answer
    x = 300,213.55

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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.