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Finding the Fourth Proportional to 520,399.20, 780,080.40 and 239,426.40

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Solution

The fourth proportional to 520,399.20, 780,080.40 and 239,426.40 is: 358,901.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,399.20 : 780,080.40 = 239,426.40 : x
  2. Step 2: Convert to fraction form
    520,399.20/780,080.40 = 239,426.40/x
  3. Step 3: Cross multiply
    520,399.20x = 780,080.40 × 239,426.40
  4. Step 4: Simplify right side
    520,399.20x = 186,771,841,882.56
  5. Step 5: Solve for x
    x = 186,771,841,882.56/520,399.20
  6. Step 6: Final answer
    x = 358,901.09

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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.