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Finding the Fourth Proportional to 399,999.20, 599,999.33 and 163,341.86

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Solution

The fourth proportional to 399,999.20, 599,999.33 and 163,341.86 is: 245,013.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,999.20 : 599,999.33 = 163,341.86 : x
  2. Step 2: Convert to fraction form
    399,999.20/599,999.33 = 163,341.86/x
  3. Step 3: Cross multiply
    399,999.20x = 599,999.33 × 163,341.86
  4. Step 4: Simplify right side
    399,999.20x = 98,005,003,969.31
  5. Step 5: Solve for x
    x = 98,005,003,969.31/399,999.20
  6. Step 6: Final answer
    x = 245,013.00

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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.