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Finding the Fourth Proportional to 509,621.70, 764,432.55 and 454,509.30

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Solution

The fourth proportional to 509,621.70, 764,432.55 and 454,509.30 is: 681,763.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,621.70 : 764,432.55 = 454,509.30 : x
  2. Step 2: Convert to fraction form
    509,621.70/764,432.55 = 454,509.30/x
  3. Step 3: Cross multiply
    509,621.70x = 764,432.55 × 454,509.30
  4. Step 4: Simplify right side
    509,621.70x = 347,441,703,197.72
  5. Step 5: Solve for x
    x = 347,441,703,197.72/509,621.70
  6. Step 6: Final answer
    x = 681,763.95

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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.