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Finding the Fourth Proportional to 520,022.20, 780,106.20 and 204,405.70

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Solution

The fourth proportional to 520,022.20, 780,106.20 and 204,405.70 is: 306,637.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,022.20 : 780,106.20 = 204,405.70 : x
  2. Step 2: Convert to fraction form
    520,022.20/780,106.20 = 204,405.70/x
  3. Step 3: Cross multiply
    520,022.20x = 780,106.20 × 204,405.70
  4. Step 4: Simplify right side
    520,022.20x = 159,458,153,885.34
  5. Step 5: Solve for x
    x = 159,458,153,885.34/520,022.20
  6. Step 6: Final answer
    x = 306,637.20

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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.