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Finding the Fourth Proportional to 260,010.40, 390,015.60 and 120,042.40

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Solution

The fourth proportional to 260,010.40, 390,015.60 and 120,042.40 is: 180,063.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,010.40 : 390,015.60 = 120,042.40 : x
  2. Step 2: Convert to fraction form
    260,010.40/390,015.60 = 120,042.40/x
  3. Step 3: Cross multiply
    260,010.40x = 390,015.60 × 120,042.40
  4. Step 4: Simplify right side
    260,010.40x = 46,818,408,661.44
  5. Step 5: Solve for x
    x = 46,818,408,661.44/260,010.40
  6. Step 6: Final answer
    x = 180,063.60

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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.