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Finding the Fourth Proportional to 399,171.18, 550,861.37 and 217,888.32

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Solution

The fourth proportional to 399,171.18, 550,861.37 and 217,888.32 is: 300,688.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,171.18 : 550,861.37 = 217,888.32 : x
  2. Step 2: Convert to fraction form
    399,171.18/550,861.37 = 217,888.32/x
  3. Step 3: Cross multiply
    399,171.18x = 550,861.37 × 217,888.32
  4. Step 4: Simplify right side
    399,171.18x = 120,026,258,462.20
  5. Step 5: Solve for x
    x = 120,026,258,462.20/399,171.18
  6. Step 6: Final answer
    x = 300,688.69

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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.