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Finding the Fourth Proportional to 260,550.72, 390,396.78 and 238,761.72

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Solution

The fourth proportional to 260,550.72, 390,396.78 and 238,761.72 is: 357,749.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,550.72 : 390,396.78 = 238,761.72 : x
  2. Step 2: Convert to fraction form
    260,550.72/390,396.78 = 238,761.72/x
  3. Step 3: Cross multiply
    260,550.72x = 390,396.78 × 238,761.72
  4. Step 4: Simplify right side
    260,550.72x = 93,211,806,675.26
  5. Step 5: Solve for x
    x = 93,211,806,675.26/260,550.72
  6. Step 6: Final answer
    x = 357,749.18

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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.