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Finding the Fourth Proportional to 520,585.20, 780,359.40 and 239,612.40

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Solution

The fourth proportional to 520,585.20, 780,359.40 and 239,612.40 is: 359,179.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,585.20 : 780,359.40 = 239,612.40 : x
  2. Step 2: Convert to fraction form
    520,585.20/780,359.40 = 239,612.40/x
  3. Step 3: Cross multiply
    520,585.20x = 780,359.40 × 239,612.40
  4. Step 4: Simplify right side
    520,585.20x = 186,983,788,696.56
  5. Step 5: Solve for x
    x = 186,983,788,696.56/520,585.20
  6. Step 6: Final answer
    x = 359,179.99

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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.