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Finding the Fourth Proportional to 399,670.08, 599,931.89 and 172,078.41

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Solution

The fourth proportional to 399,670.08, 599,931.89 and 172,078.41 is: 258,301.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,670.08 : 599,931.89 = 172,078.41 : x
  2. Step 2: Convert to fraction form
    399,670.08/599,931.89 = 172,078.41/x
  3. Step 3: Cross multiply
    399,670.08x = 599,931.89 × 172,078.41
  4. Step 4: Simplify right side
    399,670.08x = 103,235,325,739.50
  5. Step 5: Solve for x
    x = 103,235,325,739.50/399,670.08
  6. Step 6: Final answer
    x = 258,301.36

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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.