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Finding the Fourth Proportional to 303,345.20, 455,017.80 and 203,812.40

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Solution

The fourth proportional to 303,345.20, 455,017.80 and 203,812.40 is: 305,718.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,345.20 : 455,017.80 = 203,812.40 : x
  2. Step 2: Convert to fraction form
    303,345.20/455,017.80 = 203,812.40/x
  3. Step 3: Cross multiply
    303,345.20x = 455,017.80 × 203,812.40
  4. Step 4: Simplify right side
    303,345.20x = 92,738,269,860.72
  5. Step 5: Solve for x
    x = 92,738,269,860.72/303,345.20
  6. Step 6: Final answer
    x = 305,718.60

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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.