Home / 330,239.58-455,285.79-215,290.86

Finding the Fourth Proportional to 330,239.58, 455,285.79 and 215,290.86

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Solution

The fourth proportional to 330,239.58, 455,285.79 and 215,290.86 is: 296,811.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,239.58 : 455,285.79 = 215,290.86 : x
  2. Step 2: Convert to fraction form
    330,239.58/455,285.79 = 215,290.86/x
  3. Step 3: Cross multiply
    330,239.58x = 455,285.79 × 215,290.86
  4. Step 4: Simplify right side
    330,239.58x = 98,018,869,523.03
  5. Step 5: Solve for x
    x = 98,018,869,523.03/330,239.58
  6. Step 6: Final answer
    x = 296,811.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.