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Finding the Fourth Proportional to 303,761.20, 455,641.80 and 215,114.80

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Solution

The fourth proportional to 303,761.20, 455,641.80 and 215,114.80 is: 322,672.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,761.20 : 455,641.80 = 215,114.80 : x
  2. Step 2: Convert to fraction form
    303,761.20/455,641.80 = 215,114.80/x
  3. Step 3: Cross multiply
    303,761.20x = 455,641.80 × 215,114.80
  4. Step 4: Simplify right side
    303,761.20x = 98,015,294,678.64
  5. Step 5: Solve for x
    x = 98,015,294,678.64/303,761.20
  6. Step 6: Final answer
    x = 322,672.20

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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.