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Finding the Fourth Proportional to 671,990.40, 1,008,135 and 245,525.40

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Solution

The fourth proportional to 671,990.40, 1,008,135 and 245,525.40 is: 368,342.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,990.40 : 1,008,135 = 245,525.40 : x
  2. Step 2: Convert to fraction form
    671,990.40/1,008,135 = 245,525.40/x
  3. Step 3: Cross multiply
    671,990.40x = 1,008,135 × 245,525.40
  4. Step 4: Simplify right side
    671,990.40x = 247,522,749,129
  5. Step 5: Solve for x
    x = 247,522,749,129/671,990.40
  6. Step 6: Final answer
    x = 368,342.69

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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.