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Finding the Fourth Proportional to 260,361.38, 390,550.70 and 89,581.45

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Solution

The fourth proportional to 260,361.38, 390,550.70 and 89,581.45 is: 134,375.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,361.38 : 390,550.70 = 89,581.45 : x
  2. Step 2: Convert to fraction form
    260,361.38/390,550.70 = 89,581.45/x
  3. Step 3: Cross multiply
    260,361.38x = 390,550.70 × 89,581.45
  4. Step 4: Simplify right side
    260,361.38x = 34,986,095,603.85
  5. Step 5: Solve for x
    x = 34,986,095,603.85/260,361.38
  6. Step 6: Final answer
    x = 134,375.13

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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.