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Finding the Fourth Proportional to 259,897.44, 389,840.40 and 72,904.08

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Solution

The fourth proportional to 259,897.44, 389,840.40 and 72,904.08 is: 109,354.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,897.44 : 389,840.40 = 72,904.08 : x
  2. Step 2: Convert to fraction form
    259,897.44/389,840.40 = 72,904.08/x
  3. Step 3: Cross multiply
    259,897.44x = 389,840.40 × 72,904.08
  4. Step 4: Simplify right side
    259,897.44x = 28,420,955,708.83
  5. Step 5: Solve for x
    x = 28,420,955,708.83/259,897.44
  6. Step 6: Final answer
    x = 109,354.50

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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.