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Finding the Fourth Proportional to 215,420.70, 322,365.60 and 187,645.80

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Solution

The fourth proportional to 215,420.70, 322,365.60 and 187,645.80 is: 280,801.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,420.70 : 322,365.60 = 187,645.80 : x
  2. Step 2: Convert to fraction form
    215,420.70/322,365.60 = 187,645.80/x
  3. Step 3: Cross multiply
    215,420.70x = 322,365.60 × 187,645.80
  4. Step 4: Simplify right side
    215,420.70x = 60,490,550,904.48
  5. Step 5: Solve for x
    x = 60,490,550,904.48/215,420.70
  6. Step 6: Final answer
    x = 280,801.94

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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.