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Finding the Fourth Proportional to 484,803.40, 726,330.30 and 428,816.20

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Solution

The fourth proportional to 484,803.40, 726,330.30 and 428,816.20 is: 642,450.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,803.40 : 726,330.30 = 428,816.20 : x
  2. Step 2: Convert to fraction form
    484,803.40/726,330.30 = 428,816.20/x
  3. Step 3: Cross multiply
    484,803.40x = 726,330.30 × 428,816.20
  4. Step 4: Simplify right side
    484,803.40x = 311,462,199,190.86
  5. Step 5: Solve for x
    x = 311,462,199,190.86/484,803.40
  6. Step 6: Final answer
    x = 642,450.53

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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.