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Finding the Fourth Proportional to 215,007.70, 322,855.80 and 171,000.40

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Solution

The fourth proportional to 215,007.70, 322,855.80 and 171,000.40 is: 256,774.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,007.70 : 322,855.80 = 171,000.40 : x
  2. Step 2: Convert to fraction form
    215,007.70/322,855.80 = 171,000.40/x
  3. Step 3: Cross multiply
    215,007.70x = 322,855.80 × 171,000.40
  4. Step 4: Simplify right side
    215,007.70x = 55,208,470,942.32
  5. Step 5: Solve for x
    x = 55,208,470,942.32/215,007.70
  6. Step 6: Final answer
    x = 256,774.39

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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.