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Finding the Fourth Proportional to 260,379.53, 390,430.37 and 123,458.75

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Solution

The fourth proportional to 260,379.53, 390,430.37 and 123,458.75 is: 185,122.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,379.53 : 390,430.37 = 123,458.75 : x
  2. Step 2: Convert to fraction form
    260,379.53/390,430.37 = 123,458.75/x
  3. Step 3: Cross multiply
    260,379.53x = 390,430.37 × 123,458.75
  4. Step 4: Simplify right side
    260,379.53x = 48,202,042,872.79
  5. Step 5: Solve for x
    x = 48,202,042,872.79/260,379.53
  6. Step 6: Final answer
    x = 185,122.25

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1.5x scale

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.