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Finding the Fourth Proportional to 422,507.50, 633,800.32 and 138,199.66

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Solution

The fourth proportional to 422,507.50, 633,800.32 and 138,199.66 is: 207,312.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,507.50 : 633,800.32 = 138,199.66 : x
  2. Step 2: Convert to fraction form
    422,507.50/633,800.32 = 138,199.66/x
  3. Step 3: Cross multiply
    422,507.50x = 633,800.32 × 138,199.66
  4. Step 4: Simplify right side
    422,507.50x = 87,590,988,731.89
  5. Step 5: Solve for x
    x = 87,590,988,731.89/422,507.50
  6. Step 6: Final answer
    x = 207,312.27

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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.