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Finding the Fourth Proportional to 260,486.69, 390,462.05 and 118,430.78

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Solution

The fourth proportional to 260,486.69, 390,462.05 and 118,430.78 is: 177,524.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,486.69 : 390,462.05 = 118,430.78 : x
  2. Step 2: Convert to fraction form
    260,486.69/390,462.05 = 118,430.78/x
  3. Step 3: Cross multiply
    260,486.69x = 390,462.05 × 118,430.78
  4. Step 4: Simplify right side
    260,486.69x = 46,242,723,485.67
  5. Step 5: Solve for x
    x = 46,242,723,485.67/260,486.69
  6. Step 6: Final answer
    x = 177,524.33

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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.