Home / 258,429.60-387,385.20-118,288.80

Finding the Fourth Proportional to 258,429.60, 387,385.20 and 118,288.80

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Solution

The fourth proportional to 258,429.60, 387,385.20 and 118,288.80 is: 177,314.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,429.60 : 387,385.20 = 118,288.80 : x
  2. Step 2: Convert to fraction form
    258,429.60/387,385.20 = 118,288.80/x
  3. Step 3: Cross multiply
    258,429.60x = 387,385.20 × 118,288.80
  4. Step 4: Simplify right side
    258,429.60x = 45,823,330,445.76
  5. Step 5: Solve for x
    x = 45,823,330,445.76/258,429.60
  6. Step 6: Final answer
    x = 177,314.56

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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.